100x40mm Wheels For 6mm Shaft For Robotics DIY For 12V DC Gear Motor Quadcopter propellers 10 x 4.5 (1 Pair) allowing heat generated by the

100x40mm Wheels For 6mm Shaft For Robotics DIY For 12V DC Gear Motor Quadcopter propellers 10 x 4.5 (1 Pair) allowing heat generated by the allowing heat generated by the SoC to transfer directly to the case walls and be expelled by the dual fans Conveyor Belt Mechanism: Use the dual shafts to drive a small scale conveyor for sorting or demonstration projects Durable Construction High quality rubber for excellent grip and traction Perfect Fit Specifically designed for 6mm shaft DC gear motors