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Invention Designer (Kits 10 - 12)

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20215 Invention Designer (Kits 10 - 12)

664 pieces in 203 part and color combinations, plus 3 minifigures.

The piece count includes the 14 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 133 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×11
  • Plate 1 x 4 Black Part 3710 Element 371026 Also in Dark Bluish Gray ×10
  • Plate 1 x 6 Black Part 3666 Element 366626 ×1
  • Plate 1 x 8 Black Part 3460 Element 346026 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×2
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 2 x 3 Dark Blue Part 3021 Element 6554192 or 4530028 ×8
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×2
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 Also in Black ×2
  • Plate 6 x 10 Dark Green Part 3033 Element 4549214 ×2
  • Plate 1 x 2 Dark Red Part 3023 Element 4539097 or 4162582 ×7
  • Plate 1 x 6 Dark Red Part 3666 Element 4539062 or 4164108 ×1
  • Plate 1 x 10 Light Bluish Gray Part 4477 Element 4251149 or 4211495 ×2
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×4
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×4
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×1
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 1 spare in the box ×3
  • Plate 1 x 10 Tan Part 4477 Element 4143409 or 447705 ×1
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×12
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×3
  • Plate 1 x 6 Tan Part 3666 Element 4124067 or 366605 ×2
  • Plate 1 x 8 Tan Part 3460 Element 4114324 or 346005 ×2
  • Plate 2 x 2 Corner Tan Part 2420 Element 4114077 or 242005 ×6
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1
  • Plate 2 x 6 Tan Part 3795 Element 4113993 or 379505 ×2
  • Plate 4 x 6 Tan Part 3032 Element 4114001 ×3
  • Plate 4 x 8 Tan Part 3035 Element 4509897 or 4191103 ×2
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×6
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×9
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×6
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×3
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×2
  • Plate 2 x 16 White Part 4282 Element 6609534 or 4119227 ×1
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×6
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×1

Bricks Sloped 70 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Black Part 61409 Element 4541191 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box Also in Dark Blue ×2
  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 Also in Dark Bluish Gray ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Blue Part 54200 Element 4504374 or 4502092 1 spare in the box Also in Black ×7
  • Brick Sloped 45° 2 x 1 Double with Inside Stud Holder Dark Blue Part 3044c Element 6285562 or 6171926 ×1
  • Brick Sloped 45° 2 x 2 Dark Blue Part 3039 Element 4153653 ×5
  • Brick Sloped 45° 2 x 2 Double Convex Dark Blue Part 3045 Element 4196736 ×6
  • Brick Sloped 45° 2 x 4 Dark Blue Part 3037 Element 4578094 or 4249899 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 Also in Black ×2
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Red Part 54200 Element 4539079 or 4531415 1 spare in the box ×2
  • Brick Sloped 33° 3 x 2 Light Bluish Gray Part 3298 Element 4211421 ×3
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Tan Part 54200 Element 4516055 or 4278069 1 spare in the box ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Tan Part 3040b Element 4121972 or 4113989 ×2
  • Brick Sloped 45° 2 x 2 Tan Part 3039 Element 4114322 ×8
  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud Tan Part 4460b Element 4129996 ×1
  • Brick Sloped Inverted 45° 2 x 1 Tan Part 3665 Element 4159196 or 366505 ×10
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Tan Part 3660 Element 4118866 ×2
  • Brick Sloped Inverted 75° 2 x 1 x 3 Tan Part 2449 Element 6030731 or 4616212 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 White Part 85984 Element 6550189 or 4547489 ×2

Plates Special 69 pieces

  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×12
  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×3
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Black Part 88072 Element 6261348 or 4569733 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×6
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×1
  • Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×1
  • Technic Plate Rotor 6 Blade with Clip Ends Connected [aka Water Wheel] - Hollow Studs Black Part 64566 Element 4539442 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Dark Blue Part 3794a ×1
  • Technic Plate 2 x 4 [3 Holes] Dark Bluish Gray Part 3709 Element 4227398 ×3
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Dark Red Part 3794a Element 4176959 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Light Bluish Gray Part 48336 Element 4244627 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Plate Special 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 64799 Element 4612621 ×2
  • Technic Plate 2 x 6 [5 Holes] Light Bluish Gray Part 32001 Element 4211542 ×2
  • Plate Special 1 x 1 with Tooth Tan Part 49668 Element 4224793 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Tan Part 3794a Element 379405 ×7
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×4
  • Plate Special 1 x 2 with Door Rail White Part 32028 Element 6550168 or 4249563 ×12
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes White Part 92593 Element 4597131 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) White Part 87580 Element 6550157 or 6126046 ×1

Plates Round Curved and Dishes 67 pieces

  • Dish 2 x 2 Inverted [Radar] Black Part 4740 Element 474026 ×1
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×9
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×7
  • Plate Round 4 x 4 with Pin Hole Dark Red Part 60474 Element 6614381 or 4631233 ×1
  • Plate Round 1 x 1 with Solid Stud Flat Silver Part 6141 Element 4633691 1 spare in the box ×5
  • Dish 2 x 2 Inverted [Radar] Light Bluish Gray Part 4740 Element 4211512 ×1
  • Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°] Light Bluish Gray Part 4285b Element 4211487 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Light Bluish Gray Part 2654 Element 4278273 or 4276273 ×6
  • Plate Round 1 x 1 with Solid Stud Tan Part 6141 Element 4161734 or 614105 1 spare in the box ×6
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Tan Part 4032a Element 4140562 or 403205 ×5
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 2 spares in the box ×22

Bricks Special 47 pieces

  • Brick Special 1 x 1 with Handle Black Part 2921 Element 6170566 or 292126 ×2
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×14
  • Brick Special 1 x 2 with Vertical Clip [Open O Clip] Black Part 30237b Element 6330197 or 6092876 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side Black Part 30414 Element 4162443 ×1
  • Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×4
  • Brick Special 1 x 1 Studs on 4 Sides Light Bluish Gray Part 4733 Element 4211511 ×2
  • Brick Special 1 x 2 with Masonry Brick Profile Light Bluish Gray Part 98283 Element 6000066 ×3
  • Brick Special 1 x 1 Studs on 4 Sides White Part 4733 Element 4111971 or 473301 ×1
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×4
  • Brick Special 1 x 2 with Groove White Part 4216 Element 6619288 or 4264360 ×14

Tiles 43 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 Also in Dark Bluish Gray ×2
  • Tile 1 x 1 with Groove Dark Blue Part 3070b Element 6554193 or 4631385 1 spare in the box ×2
  • Tile 1 x 2 with Groove Dark Blue Part 3069b Element 6554190 or 4528488 ×16
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 Also in Black ×3
  • Tile 1 x 1 with Groove Dark Red Part 3070b Element 4550169 or 4187196 1 spare in the box ×1
  • Tile 1 x 4 with Groove Dark Red Part 2431 Element 4539060 or 4164220 ×2
  • Tile 1 x 1 with White and Red Gauge Print Light Bluish Gray Part 3070bpr0007 Element 4255629 1 spare in the box ×2
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×6
  • Tile 1 x 2 with Red 82, Yellow and White Gauges Print Light Bluish Gray Part 3069bpr0101 Element 4227776 ×3
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×2
  • Tile 2 x 4 with Groove White Part 87079 Element 6548271 or 4560178 ×2

Bricks 41 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×8
  • Brick 1 x 4 Black Part 3010 Element 301026 ×3
  • Brick 2 x 2 Corner Black Part 2357 Element 235776 or 235726 ×2
  • Brick 2 x 4 Black Part 3001 Element 300126 ×2
  • Brick 1 x 2 Dark Blue Part 3004 Element 4249891 ×3
  • Brick 1 x 3 Dark Bluish Gray Part 3622 Element 4211104 ×2
  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×4
  • Brick 1 x 2 Tan Part 3004 Element 4109995 or 300405 ×3
  • Brick 1 x 3 Tan Part 3622 Element 4162465 or 4113920 ×2
  • Brick 1 x 6 Tan Part 3009 Element 4112982 or 300905 ×3
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×4
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×2
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×3

Bricks Round and Cones 41 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×4
  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×2
  • Cone 2 x 2 x 2, Open Stud Black Part 3942c Element 6092664 or 6022160 ×1
  • Brick Round 1 x 1 Open Stud Dark Red Part 3062b Element 4539099 or 4183880 ×6
  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Light Bluish Gray Part 30367b ×1
  • Brick Round 2 x 2 [Grill] Light Bluish Gray Part 92947 Element 4650645 or 4610816 ×2
  • Cone 1 x 1 [Top Groove] Light Bluish Gray Part 59900 Element 4529241 ×5
  • Cone 1 x 1 [Top Groove] Tan Part 59900 Element 4529237 ×1
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×6
  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder White Part 30367b ×3
  • Brick Round 2 x 2 [Grill] White Part 92947 Element 6615536 or 4650644 ×10

Technic Bricks 22 pieces

  • Technic Brick 1 x 1 with Pin Hole Black Part 6541 Element 654126 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Black Part 32064b ×5
  • Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Light Bluish Gray Part 3701 Element 4211441 ×6
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×3

Bricks Curved 19 pieces

  • Brick Curved 2 x 2, Two Top Studs Black Part 30165 Element 4200023 or 4113231 ×2
  • Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Dark Blue Part 11153 Element 6580395 or 6554195 ×4
  • Brick Curved Inverted 6 x 1 Tan Part 42023 Element 6495042 or 6030729 ×12
  • Brick Arch 1 x 6 Raised Arch White Part 92950 Element 6601942 or 4620761 ×1

Technic Axles 17 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×4
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×2
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×3

Tiles Special 16 pieces

  • Tile Special 1 x 1 with Clip with Rounded Tips Black Part 12825 Element 6030718 ×3
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Red Part 2412b Element 4541506 or 4528969 ×13

Technic Gears 15 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×6
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×2
  • Technic Gear 8 Tooth Dark Bluish Gray Part 3647 Element 4514559 1 spare in the box ×1
  • Technic Gear Rack 1 x 4 Light Bluish Gray Part 3743 Element 6457283 or 4211450 ×1
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 1 spare in the box ×5

Minifig Accessories 8 pieces

  • Tap 1 x 1 without Hole in Spout Black Part 4599b Element 459926 1 spare in the box ×1
  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×2
  • Equipment Sextant Dark Bluish Gray Part 30154 Element 6269999 or 4217675 ×1
  • Equipment Binoculars Light Bluish Gray Part 30162 Element 4550170 or 4212313 ×1
  • Equipment Signal Paddle Light Bluish Gray Part 3900 Element 4211753 ×1
  • Tap 1 x 1 without Hole in Spout White Part 4599b Element 459901 1 spare in the box ×2

Bars, Ladders and Fences 6 pieces

  • Bar 6L with Stop Ring Black Part 63965 Element 6170421 or 6081988 ×1
  • Lever Small Base with Black Lever Black Part 298c02 Element 73587 2 spares in the box ×3
  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×1
  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Dark Blue Part 58176 Element 6328198 or 6171763 ×1

Technic Connectors 6 pieces

  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×2
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×3
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Light Bluish Gray Part 6553 Element 4211536 ×1

Technic Beams 5 pieces

  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×1
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×2
  • Technic Beam 1 x 4 Thin White Part 32449 Element 6360072 or 4144138 ×2

Technic Pins 5 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 2 spares in the box ×3

Tiles Round and Curved 5 pieces

  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×2
  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Bluish Gray Part 4150pr0022 Element 4221881 ×1
  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×2

Plates Wedged 4 pieces

  • Wedge Plate 8 x 3, 22° Left Light Bluish Gray Part 50305 Element 4258275 or 4228302 ×2
  • Wedge Plate 8 x 3, 22° Right Light Bluish Gray Part 50304 Element 4258273 or 4228300 ×2

Transportation - Land 4 pieces

  • Steering Wheel Small, 2 x 2 Black Part 30663 Element 4153044 ×3
  • Seat / Chair 2 x 2 with Center Sprue Mark Reddish Brown Part 4079b ×1

Gear Parts 3 pieces

  • Design Handbook MBA KIT 10 [No Color/Any Color] Part 6043632 Element 6043632 ×1
  • Design Handbook MBA KIT 11 [No Color/Any Color] Part 6043634 Element 6043634 ×1
  • Design Handbook MBA KIT 12 [No Color/Any Color] Part 6043635 Element 6043635 ×1

Technic Bushes 3 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 2 spares in the box ×3

Hinges, Arms and Turntables 2 pieces

  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Black Part 73983 Element 6102782 or 74011 ×1
  • Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×1

Minifig Upper Body 2 pieces

  • Arm Mechanical with 2 Clips [Battle Droid] White Part 30377 Element 6321345 or 4260649 1 spare in the box ×2

Panels 2 pieces

  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Black Part 87552 Element 4593678 ×2

String, Bands and Reels 2 pieces

  • Chain 6L [5 Links] Pearl Gold Part 92338 Element 6323688 or 4600501 ×2

Transportation - Sea and Air 2 pieces

  • Propeller 7 Blade 6 Diameter Flat Silver Part 87751 Element 6493590 or 6176468 ×2

Large Buildable Figures 1 piece

  • Large Figure Weapon Ammo, Flexible Ammunition Belt Black Part 98567 Element 4652060 ×1

Minifig Neckwear 1 piece

  • Minifig Neckwear Bracket [One Stud] Light Bluish Gray Part 42446 Element 4211760 2 spares in the box ×1

Minifig Shields, Weapons, & Tools 1 piece

  • Weapon Lightsaber Hilt with Bottom Ring Light Bluish Gray Part 64567 Element 4581155 or 4539481 1 spare in the box ×1

Plants & Trees 1 piece

  • Plant, Round 1 x 1 - 3 Bamboo Leaves Green Part 30176 Element 6270003 or 6248461 ×1

Technic Special 1 piece

  • Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Black Part 32124 Element 6280168 or 4114689 ×1

Minifigures 3 figures

  • MBA Level Four Kit 12 Minifigure, checked as a whole figure ×1
  • MBA Level Four Kit 11 Minifigure, checked as a whole figure ×1
  • MBA Level Four Kit 10 Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

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