Feature: 1. 360 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. 2. With 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. 3. Flexible: 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. 4. Application: 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. 5. Nylon Rubber and Brass: The robot omni wheel is made of premium nylon, rubber and brass, which is durable and has long service life. Specification: Item Type: Robot Omni Directional Wheel Material: Nylon, rubber and brass Gross Weight: 403g/14.2oz Color: Black grey Roller Shaft: brass Roller Bearing: Copper tube Wheel Diameter: 100mm/3.9in Wheel Width: 39mm/1.5in Wheel Aperture: 12mm/0.47in Number of Boards: 2 Number of Rollers: 18 Load Capacity: 15kg Suitable for: Robot cars, robot platforms and other toys. Package List: 1 x Robot Omni Directional Wheel2 x Screws Note: 1. Due to manual measurement, 1 to 3mm error is allowed, thank you!2. Due to the difference between different displays, the picture may not reflect the actual color of the item.