1、The wheel adapter is suitable for the intelligent robots field, the shaft clamp can be fixed to the center of the omni wheel through the wheel adapter to drive. 2、There are 4pcs M4 threaded holes and 4 through holes with a diameter of 4mm, with standard size and easy installation. 3、The through hole adopts the countersunk hole design, which can avoid the protrusion of the screw head and ensure the flatness of the mounting surface. 4、There are 3 holes with different diameters on each convex edge of the adapter, which can be compatible with a variety of wheels. 5、The wheel adapter is made of aluminum alloy, which is light and corrosion resistant, not easy to wear and deform. Item Type: Wheel Adapter Material: Aluminum alloy Model: 3206-0016-0005 Center Aperture Size: Approx. 14mm / 0.6in Screw Hole: M4 x 0.7mm Purpose: Connect the omni wheel through adapter to drive the wheel, suitable for intelligent robots Compatible for Andymark Wheels: 4in invisible wheel For HiGrip wheels For SmoothGrip wheel 6in rubber tread wheel 8in rubber tread wheel 4in HD omni Wheel Performance wheel Pneumatic wheel Balance wheel Compatible for Nexus Wheels: 4in aluminum omni wheel 5in aluminum omni wheel 6in aluminum omni wheel 8in aluminum omni wheel 10in aluminum omni wheel 4in double plastic omni wheel 4in double aluminum omni wheel Compatible for VEX Wheels: For Mecanum Wheel For Versa wheel Traction wheel Omni wheel Compatible for Tetrix Wheel: For Tetrix omni wheels 3 x Wheel Adapter