Back to Technic Pin Double with Axle Hole
Robotics Invention System Upgrade Kit (1.5) (3803-1) is a RCX LEGO set released in 1999 with 70 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 25 unique part types.
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Parts in this set
25 parts · updating…
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Plate 2 x 2 Corner2420 · ×8 · Light Gray -
Plate Special 2 x 2 with 2 Pin Holes2817 · ×2 · Light Gray -
Rubber Band Small 13mm (Square Cross Section)71509 · ×2 · Black -
![Rubber Belt Small [15mm ID] [Round Cross Section]](https://cdn.rebrickable.com/media/parts/elements/4544140.jpg)
Rubber Belt Small [15mm ID] [Round Cross Section]85543 · ×2 · White -
Sticker Sheet for Sets 3803-1,9732-172047 · ×1 · [No Color/Any Color] -
Technic Axle 2 Notched32062 · ×2 · Black -
Technic Axle 43705 · ×4 · Black -
Technic Axle 532073 · ×2 · Black -
Technic Axle 63706 · ×2 · Black -
Technic Axle 83707 · ×1 · Black -
Technic Axle and Pin Connector Angled #2 - 180°32034 · ×2 · Blue -
Technic Axle and Pin Connector Perpendicular6536 · ×8 · Light Gray -
![Technic Axle Connector Ridged [with x Hole x Orientation]](https://cdn.rebrickable.com/media/parts/elements/4113804.jpg)
Technic Axle Connector Ridged [with x Hole x Orientation]6538b · ×2 · Light Gray -
Technic Beam 1 x 3 Thin6632 · ×2 · Light Gray -
Technic Beam 1 x 5 Thin32017 · ×2 · Light Gray -
Technic Beam 1 x 7 Thin32065 · ×4 · Black -
Technic Beam 1 x 9 Bent (6 - 4) Thick6629 · ×2 · Black -
Technic Beam 2 x 4 L-Shape Thick32140 · ×2 · Black -
Technic Beam 3 x 3 L-Shape Thin32056 · ×4 · Light Gray -
Technic Bush 1/2 Smooth with Axle Hole Reduced32123a · ×3 · Light Gray -
Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray Center76019 · ×1 · White -
Technic Modular Connector32137 · ×4 · Trans-Dark Blue -
Technic Pin Double with Axle Hole32138 · ×2 · Yellow -
![Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]](https://cdn.rebrickable.com/media/parts/elements/4107741.jpg)
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]32054 · ×4 · Blue -
![Technic Rubber Belt Medium [26mm ID] [Round Cross Section]](https://cdn.rebrickable.com/media/parts/elements/4544147.jpg)
Technic Rubber Belt Medium [26mm ID] [Round Cross Section]85545 · ×2 · Blue