DUO Flap Wheels are compatible with the REV DUO System and feature a 5mm Hex Bore. They are used on intakes to pick up irregular gamepieces, playing a similar role to compliant wheels. While compliant wheels provide compliance with minimal slip between the wheel and the gamepiece, the DUO Flap Wheels are strategically designed to allow necessary slip between the intake and the gamepiece, catering to diverse situations and gamepiece variations. What sets this design apart is its versatility – a "one side fits all" solution, as it can be cut to size with scissors as needed. This adaptability ensures a customized fit for your specific needs. Features Marks for cutting flaps to length with scissors Specifications Material: Polypropylene & TPR Durometer: Varies (see table below) Weight: 9.07g (0.03lb) HARDNESS COLOR DUROMETER Soft like a rubber band Light Gray 30A Medium like a pencil eraser Dark Gray 40A Hard like a tire tread Black 60A Documentation DUO Build System Guide DUO Flap Wheels Product Options SKU PRODUCT NAME CAD & DRAWINGS REV-41-2701-PK4 Flap Wheel - 5mm Hex Bore - Soft (Light Gray) - 4 Pack STEP FILE ONSHAPE DRAWING REV-41-2702-PK4 Flap Wheel - 5mm Hex Bore - Medium (Dark Gray) - 4 Pack STEP FILE ONSHAPE DRAWING REV-41-2703-PK4 Flap Wheel - 5mm Hex Bore - Hard (Black) - 4 Pack STEP FILE ONSHAPE DRAWING