Item Type: Robot Omni Directional Wheel_x000D_Material: Nylon, rubber and brass_x000D_Gross Weight: 403g/14. 2oz_x000D_Color: Black grey_x000D_Roller Shaft: brass_x000D_Roller Bearing: Copper tube_x000D_Wheel Diameter: 100mm/3. 9in_x000D_Wheel Width: 39mm/1. 5in_x000D_Wheel Aperture: 12mm/0. 47in_x000D_Number of Boards: 2_x000D_Number of Rollers: 18_x000D_Load Capacity: 15kg_x000D_Suitable for: Robot cars, robot platforms and other toys 1360 Degree Rotating: The wheel can be rotated at 360 degree, with rotation and lateral maneuverability, solid structure, suitable for different environments, and low maintenance cost. 2With Central Bearing: With the central bearing equipped with mounting screws, the omni directional wheel is more solid, the fixed direction is clear, the installation selection is simple and stable, and the load stability is excellent. 3Flexible: All directional movement and rotation, easy direction control and tracking, make turning faster than ordinary wheels, clear fixed direction, simple and stable installation, and good load stability. 4Application: 100mm omni directional wheels are designed for ground and inverted applications, such as manual and electric transmission systems, feed rails, workstation turntables, robot wheels, etc. 5Nylon Rubber and Brass: The robot omni wheel is made of premium nylon, rubber and brass, which is durable and has long service life.