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Ultimate Builders Set (3800-1) is a RCX LEGO set released in 2001 with 322 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing RCX sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 70 unique part types.
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Parts in this set
70 parts · page 1 of 2 · updating…
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Arm Piece with Pin, 2 Fingers6048a · ×4 · Black -
CD-Rom, Ultimate Builders Set (Set 3800)4153273 · ×1 · [No Color/Any Color] -
Hose, Pneumatic 4mm D. 195L5102c195 · ×1 · Trans-Clear -
Large Figure Throwing Disk, MindStorms Print32171pr0062 · ×6 · Black -
![Motor, 9V Mini [Old Style]](https://cdn.rebrickable.com/media/parts/ldraw/7/71427.png)
Motor, 9V Mini [Old Style]71427c01 · ×1 · Light Gray -
Plate Round 1 x 1 with Solid Stud6141 · ×36 · Light Gray -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×2 · White -
Plate Special 1 x 2 with Door Rail32028 · ×4 · Light Gray -
Plate Special 2 x 2 with 2 Pin Holes2817 · ×4 · Light Gray -
Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top2793c01 · ×1 · Trans-Clear -
Pneumatic Pump 1 x 5.574982 · ×1 · Blue -
Pneumatic Switch with Top Studs75215 · ×1 · Light Gray -
Rubber Band Small 13mm (Square Cross Section)71509 · ×4 · Black -
String Cord Medium Thickness 200cm14728c200 · ×1 · Black -
Technic Axle 103737 · ×1 · Black -
Technic Axle 2 Notched32062 · ×5 · Black -
Technic Axle 34519 · ×5 · Black -
Technic Axle 3 with Stud6587 · ×4 · Dark Gray -
Technic Axle 532073 · ×4 · Black -
![Technic Axle 5.5 with Stop [Flat Short End]](https://cdn.rebrickable.com/media/parts/elements/4120471.jpg)
Technic Axle 5.5 with Stop [Flat Short End]32209 · ×2 · White -
Technic Axle and Pin Connector Angled #4 - 135°32192 · ×2 · Black -
Technic Axle and Pin Connector Perpendicular6536 · ×6 · Black -
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole32184 · ×4 · Blue -
Technic Axle and Pin Connector Perpendicular Double32291 · ×4 · Black -
![Technic Axle Connector Ridged [with x Hole x Orientation]](https://cdn.rebrickable.com/media/parts/elements/4113807.jpg)
Technic Axle Connector Ridged [with x Hole x Orientation]6538b · ×2 · Blue -
Technic Axle Connector with Axle Hole32039 · ×4 · Light Gray -
Technic Axle Connector with Axle Hole32039 · ×4 · Black -
Technic Axle Pin without Friction Ridges Lengthwise3749 · ×6 · Light Gray -
Technic Beam 1 x 15 Thick32278 · ×6 · Black -
Technic Beam 1 x 15 Thick32278 · ×5 · Blue -
Technic Beam 1 x 3 Thick32523 · ×6 · Blue -
Technic Beam 1 x 3 Thin6632 · ×2 · Light Gray -
Technic Beam 1 x 3 Thin6632 · ×4 · Black -
Technic Beam 1 x 3 Thin6632 · ×2 · Blue -
Technic Beam 1 x 4 Thin32449 · ×4 · Blue -
Technic Beam 1 x 4 Thin32449 · ×4 · Black -
Technic Beam 1 x 4 Thin with Stud Connector2825 · ×2 · Light Gray -
Technic Beam 1 x 5 Thick32316 · ×8 · Blue -
Technic Beam 1 x 7 Bent (4 - 4) Thick32348 · ×2 · Blue -
Technic Beam 1 x 7 Thick32524 · ×4 · Blue -
Technic Beam 1 x 9 Bent (7 - 3) Thick32271 · ×2 · Trans-Neon Green -
Technic Beam 1 x 9 Bent (7 - 3) Thick32271 · ×2 · Trans-Neon Orange -
Technic Beam 2 x 4 L-Shape Thick32140 · ×4 · Black -
Technic Beam 3 x 5 L-Shape Thick32526 · ×2 · Black -
Technic Beam 3 x 5 L-Shape Thick32526 · ×2 · Yellow -
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin32250 · ×4 · Blue -
![Technic Beam Triangle Thin [Type I]](https://cdn.rebrickable.com/media/parts/elements/4254627.jpg)
Technic Beam Triangle Thin [Type I]2905 · ×2 · Blue -
Technic Brick 1 x 1 with Pin Hole6541 · ×14 · Black