Features 1、TPU rubber rollers are made of high-quality polyurethane TPU material, with good friction and extremely long service life 2、All parts except TPU rubber roller are made of aluminum, which will not be easily deformed 3、TPU rubber rollers use one bearing at each end for smoother operation and strong load 4、Allows the robot to achieve all-round motion while supporting larger loads 5、The main body is stamped from aluminum, which has good rigidity and strong impact resistance. Specification Item Type: Mecanum Wheel Diameter: Approx. 100mm / 4.0in Wheel Width: Approx. 50mm / 2in Composition: TPU rubber rollers x 9 + wheels are stamped from aluminum Features: 45 degree omnidirectional wheel, single wheel load 30KG. Each TPU rubber roller is equipped with two bearings Package List 1 x Mecanum Wheel(right) 1 x Wheel Coupling