Monorail Transport Base (6991): parts list and STL files

Set 6991, Monorail Transport Base, from 1994, has 573 pieces in 186 kinds of part and colour. Here is every part, with the ones you can 3D print at home and the ones to buy.

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Free: an STL file for every part you can print, the parts list and a BrickLink shopping list for the rest. Pro adds print-ready plates for a 256 mm bed and our printing guide. About ProYour Pro includes the print-ready plates.

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Monorail Transport Base, built (3D picture) — What it looks like built. A 3D picture, not a photo, made from the LDraw model by Javier Orquera (CC BY 2.0).

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424to print

149to buy

0spares

186kinds

424 to print, 149 to buy, 0 spares. Print: plain bricks, plates and beams you can make on a home 3D printer. Buy: clear, printed, rubber, electric and very thin parts, which are better ordered. Spares are the extras in the box.

Every part in set 6991

Parts in set 6991, Monorail Transport Base
Colour	Part	Qty	Print or buy
Black	3710 Plate 1 x 4	38	Print
Black	2681 Support 6 x 6 x 10 Stanchion	23	Print
Blue	3023 Plate 1 x 2	20	Print
Black	3023 Plate 1 x 2	18	Print
Light Gray	2412b Tile Special 1 x 2 Grille with Bottom Groove	16	Print
Light Gray	3004 Brick 1 x 2	10	Print
Black	3022 Plate 2 x 2	10	Print
Light Gray	3023 Plate 1 x 2	8	Print
Light Gray	4032a Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	7	Print
Black	2412b Tile Special 1 x 2 Grille with Bottom Groove	6	Print
Light Gray	2465 Brick 1 x 16	6	Print
Black	3623 Plate 1 x 3	6	Print
Light Gray	3794a Plate Special 1 x 2 with 1 Stud without Groove (Jumper)	6	Print
Light Gray	4162 Tile 1 x 8 with Groove	6	Print
Black	2444 Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]	5	Print
Black	3039 Brick Sloped 45° 2 x 2	5	Print
Black	2362a Panel 1 x 2 x 3 - Solid Studs	4	Print
Black	2419 Wedge Plate 3 x 6 Cut Corners	4	Print
Light Gray	2431 Tile 1 x 4 with Groove	4	Print
Light Gray	3008 Brick 1 x 8	4	Print
Light Gray	3022 Plate 2 x 2	4	Print
Light Gray	3040b Brick Sloped 45° 2 x 1 with Bottom Pin	4	Print
Blue	3460 Plate 1 x 8	4	Print
Black	3460 Plate 1 x 8	4	Print
Blue	3623 Plate 1 x 3	4	Print
Black	3666 Plate 1 x 6	4	Print
Light Gray	3673 Pin without Friction Ridges Lengthwise	4	Print
Black	3940b Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole	4	Print
Black	4070 Brick Special 1 x 1 with Headlight	4	Print
Black	4151a Plate Special 8 x 8 with Grille [No Hole in Center]	4	Print
Blue	4162 Tile 1 x 8 with Groove	4	Print
Black	4162 Tile 1 x 8 with Groove	4	Print
Blue	6019 Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]	4	Print
Black	2465 Brick 1 x 16	3	Print
Light Gray	2654 Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	3	Print
Black	3004 Brick 1 x 2	3	Print
Black	3008 Brick 1 x 8	3	Print
Black	3020 Plate 2 x 4	3	Print
Black	3035 Plate 4 x 8	3	Print
Black	3068b Tile 2 x 2 with Groove	3	Print
Light Gray	3298 Brick Sloped 33° 3 x 2	3	Print
Blue	3300 Brick Sloped 33° 2 x 2 Double	3	Print
Light Gray	3710 Plate 1 x 4	3	Print
Light Gray	3713 Bush	3	Print
Black	4477 Plate 1 x 10	3	Print
Black	4590 Plate Special 1 x 4 Offset with Bar Holes	3	Print
Black	6019 Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]	3	Print
Light Gray	2357 Brick 2 x 2 Corner	2	Print
Black	2420 Plate 2 x 2 Corner	2	Print
Black	2431 Tile 1 x 4 with Groove	2	Print
Light Gray	2444 Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]	2	Print
Light Gray	2445 Plate 2 x 12	2	Print
Black	2452 Hinge Plate 1 x 2 with 3 Fingers On Side	2	Print
Black	2453a Brick 1 x 1 x 5 with Blocked Open or Hollow Stud	2	Print
Light Gray	2540 Plate Special 1 x 2 Side Handle [Free Ends]	2	Print
Black	2680 Support 4 x 4 x 5 Stanchion, Tall Studs	2	Print
Light Gray	2744 Slope Long 1 x 6 with 3 Pin Holes	2	Print
Black	2744 Slope Long 1 x 6 with 3 Pin Holes	2	Print
Black	2780 Pin with Friction Ridges Lengthwise and Center Slots	2	Print
Black	2923 Hinge Bar 2.5L with 2 and 3 Fingers on Ends (Pantograph Shoe Holder)	2	Print
Light Gray	3001 Brick 2 x 4	2	Print
Light Gray	3002 Brick 2 x 3	2	Print
Black	3002 Brick 2 x 3	2	Print
Light Gray	3003 Brick 2 x 2	2	Print
Black	3003 Brick 2 x 2	2	Print
Black	3009 Brick 1 x 6	2	Print
Light Gray	3010 Brick 1 x 4	2	Print
Blue	3022 Plate 2 x 2	2	Print
Black	3024 Plate 1 x 1	2	Print
Black	3034 Plate 2 x 8	2	Print
Light Gray	3039 Brick Sloped 45° 2 x 2	2	Print
Black	3040b Brick Sloped 45° 2 x 1 with Bottom Pin	2	Print
Light Gray	3297 Brick Sloped 33° 3 x 4	2	Print
Black	3298 Brick Sloped 33° 3 x 2	2	Print
Black	3403c01 Turntable 4 x 4 Square Base with Top, Complete Assembly	2	Print
Black	3737 Axle 10	2	Print
Black	3738 Plate 2 x 8 [7 Holes]	2	Print
Black	3795 Plate 2 x 6	2	Print
Black	3941 Brick Round 2 x 2 with Axle Hole	2	Print
Light Gray	3942c Cone 2 x 2 x 2, Open Stud	2	Print
Black	3956 Bracket 2 x 2 - 2 x 2	2	Print
Blue	4032a Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	2	Print
Black	4081b Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]	2	Print
Light Gray	4081b Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]	2	Print
Blue	4275b Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]	2	Print
Black	4276b Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs	2	Print
Black	4282 Plate 2 x 16	2	Print
Black	4315 Hinge Vehicle Roof Holder 1 x 4	2	Print
Light Gray	4596 Plate Special 1 x 2 with Long Stud Receptacle (Space Wing)	2	Print
Light Gray	4733 Brick Special 1 x 1 Studs on 4 Sides	2	Print
Black	6104 Wedge Plate 8 x 8 with 3 x 4 Cutout	2	Print
Light Gray	6111 Brick 1 x 10	2	Print
Black	6111 Brick 1 x 10	2	Print
Light Gray	6153a Brick Wedged, Sloped 6 x 4 Cutout, No Stud Notches	2	Print
Black	6541 Brick 1 x 1 with Pin Hole	2	Print
Blue	2412b Tile Special 1 x 2 Grille with Bottom Groove	1	Print
Black	2436 Bracket 1 x 2 - 1 x 4 [Square Corners]	1	Print
Black	2555 Tile Special 1 x 1 with Clip and Straight Tips	1	Print
Black	3001 Brick 2 x 4	1	Print
Light Gray	3007 Brick 2 x 8	1	Print
Light Gray	3020 Plate 2 x 4	1	Print
Black	3027 Plate 6 x 16	1	Print
Black	3030 Plate 4 x 10	1	Print
Black	3032 Plate 4 x 6	1	Print
Light Gray	3032 Plate 4 x 6	1	Print
Light Gray	3176 Plate Special 3 x 2 with Rounded End, Hole	1	Print
Light Gray	3660 Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]	1	Print
Black	3747a Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin	1	Print
Black	3794a Plate Special 1 x 2 with 1 Stud without Groove (Jumper)	1	Print
Light Gray	3832 Plate 2 x 10	1	Print
Black	3839b Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment]	1	Print
Blue	3839b Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment]	1	Print
Black	3943b Cone 4 x 4 x 2, Axle Hole [Plain]	1	Print
Black	4085c Plate Special 1 x 1 with Clip Vertical [Thick U Clip]	1	Print
Black	4150 Tile Round 2 x 2 with Bottom Cross	1	Print
Light Gray	4265b Bush 1/2 Toothed Type II [X Opening]	1	Print
Black	4285a Dish 6 x 6 Inverted, Radar / Webbed [No Anti-studs]	1	Print
Light Gray	4286 Brick Sloped 33° 3 x 1	1	Print
Light Gray	4730 Brick Special 2 x 2 with Pin and No Axle Hole	1	Print
Black	4859 Wedge Plate 3 x 4 without Stud Notches	1	Print
Black	6061 Brick 2 x 4 x 2 with Holes on Sides	1	Print
Black	6087 Bracket 5 x 2 x 2 1/3 with Holes, Smooth Bottom	1	Print
Light Gray	9244 Universal Joint 4L [Complete Assembly]	1	Print
Trans-Neon Green	2569 Antenna 8H Whip	9	Buy
Trans-Neon Green	6141 Plate Round 1 x 1 with Solid Stud	8	Buy
Trans-Dark Blue	2466 Panel 3 x 2 x 6	7	Buy
Blue	3475b Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]	6	Buy
Light Gray	4476b Support 2 x 4 x 5 Stanchion Inclined [5mm wide posts]	6	Buy
Light Gray	2670 Vehicle Track, Monorail Straight Short	5	Buy
Trans-Neon Green	4740 Dish 2 x 2 Inverted [Radar]	5	Buy
Light Gray	2340 Wing, Tail 4 x 1 x 3	4	Buy
Black	2515 Wheel Hard Plastic Large (54mm D. x 30mm)	4	Buy
Light Gray	2672 Vehicle Track, Monorail Curve Long	4	Buy
Black	3039pr9973 Brick Sloped 45° 2 x 2 with Horizon Screen Print	4	Buy
Trans-Dark Blue	3960 Dish 4 x 4 Inverted [Radar]	4	Buy
Black	3069bpr9981 Tile 1 x 2 with Arrow Long Yellow with Black Border Print	3	Buy
Trans-Dark Blue	4740 Dish 2 x 2 Inverted [Radar]	3	Buy
Trans-Dark Blue	2447 Headwear Accessory Visor For Standard Helmet	3	Buy
Blue	3838 Minifig Neckwear Airtanks	3	Buy
Yellow	970c17 Hips and Light Gray Legs	3	Buy
Dark Gray	973c17h28pr0064 Torso, Yellow and Black Panels and Circuitry Print, Light Gray Arms, Blue Hands	3	Buy
Trans-Dark Blue	2408 Panel 10 x 6 x 11	2	Buy
Trans-Dark Blue	2507 Windscreen 10 x 4 x 2 1/3 Canopy	2	Buy
Light Gray	2677 Vehicle Track, Monorail Ramp Lower Part	2	Buy
Light Gray	2678 Vehicle Track, Monorail Track Ramp Upper Part	2	Buy
Black	2686c01 Wheel Holder, Monorail Bogey with Bogey Bracket/Pivot	2	Buy
Black	2687 Vehicle Base, Monorail 4 x 20	2	Buy
Light Gray	2774 Vehicle Track, Monorail Monoswitch	2	Buy
Light Gray	298c02 Lever Small Base with Black Lever	2	Buy
Black	3068bpr0021 Tile 2 x 2 with Yellow Arrow without Border Print	2	Buy
Black	3069bpr0038 Tile 1 x 2 with Arrow Short Yellow without Black Border Print	2	Buy
Light Gray	3479 Tail 4 x 2 x 2	2	Buy
Black	3857 Baseplate 16 x 32	2	Buy
Light Gray	3959 Weapon Gun / Torch (Space) [with Grooves]	2	Buy
Black	3959 Weapon Gun / Torch (Space) [with Grooves]	2	Buy
Blue	3963 Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets	2	Buy
Black	3963 Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets	2	Buy
Trans-Neon Green	4589 Cone 1 x 1 [No Top Groove]	2	Buy
Light Gray	73590c01a Flexible Hose 8.5L with Tabless Ends (Ends same color as Tube)	2	Buy
Yellow	2446 Helmet, Standard	2	Buy
Yellow	3626bpr0037 Minifig Head Rebel Pilot (Dutch Vander) / Aquanaut, Headset Over Smile, Red-Brown Hair & Eyebrows Print [Blocked Open Stud]	2	Buy
[No Color/Any Color]	168285 Sticker Sheet for Set 6991-1	1	Buy
Black	2552pr0002 Baseplate Raised 32 x 32 with Ramp and Pit, Crater Print	1	Buy
Light Gray	2671 Vehicle Track, Monorail Track Straight Long	1	Buy
White	2684c01b Motor, Monorail 9V with Long Couplings [Complete Assembly]	1	Buy
Light Gray	2881c01 Vehicle Track, Monorail Point Right	1	Buy
Light Gray	2886c01 Vehicle Track, Monorail Point Left	1	Buy
Light Gray	2891 Vehicle Track, Monorail Curve Short Right	1	Buy
Light Gray	2892 Vehicle Track, Monorail Curve Short Left	1	Buy
Black	3039pr9968 Brick Sloped 45° 2 x 2 with Spyrius Droid Image Print	1	Buy
White	3069bpr0025 Tile 1 x 2 with Digital Clock Print - '12:01' or '10:21'	1	Buy
Black	3482 Wheel with Split Axle hole	1	Buy
Black	3634 Tyre 43 x 17	1	Buy
Light Gray	3829c01 Steering Stand 1 x 2 with Black Steering Wheel	1	Buy
Black	4229 Engine, Strakes, 2 x 2 Thin Top Plate	1	Buy
Black	4760c01 Battery Box, 9V Small [Complete Assembly]	1	Buy
Black	4771 Light Brick 1 x 4 [Two Bulbs]	1	Buy
Black	5306bc015 Wire with Brick 2 x 2 x 2/3 Pair, 15L	1	Buy
Dark Gray	6082 Rock Panel Rectangular 4 x 10 x 6	1	Buy
Dark Gray	6083 Rock Panel Triangular 3 x 8 x 7	1	Buy
Trans-Clear	2446 Helmet, Standard	1	Buy
Black	3626bpr0023 Minifig Head Time Cruisers Robot / Spyrius Droid, Silver Eyes and Circuitry Print [Blocked Open Stud]	1	Buy
Red	970c22pr0019 Hips and Red Legs with Silver and Black Robot Print	1	Buy
Red	973c03h22pr0063 Torso, Robot Print (Spyrius), Black Arms, Red Hands	1	Buy
Yellow	2446pr0030 Helmet, Standard with Silver and Blue Machinery Print	1	Buy
Yellow	3626bpr0038 Minifig Head Unitron Chief / RoboForce, Silver Sunglasses and Red Headset Print [Blocked Open Stud]	1	Buy

Print set 6991 at home

The set tool makes an STL file for each of the 424 printable pieces, sorted by colour, plus a shopping list for the 149 to buy. Free, no account, and it runs on your own phone or computer.

Get the free print files

Pro adds print-ready plates for a 256 mm bed. About Pro

Parts data: Rebrickable, and it can differ slightly from your box. Part shapes: LDraw Parts Library (CC BY 4.0). Browse all sets. Independent project, not sponsored, authorised or endorsed by any brick company.