Item Type: Omni Directional Wheel Material: Aluminum alloy Roller Material: Rubber Gross Weight: 416g / 14.7oz Wheel Diameter: 60mm / 2.4in Wheel Width: 32mm / 1.3in Number of Rollers: 8 Number of Boards: 2 Roller Length: 30mm / 1.2in Load Capacity: 10kg Application: Applicable to various small robots Package List 4 x 60mm Omni Directional Wheels 8 x Coupling 20 x Screws 1. Due to manual measurement, 13mm error is allowed, thank you 2. Due to the difference between different monitors, the picture may not reflect the actual color of the project.3. The 4mm Hub configuration can be purchased to connect the motor, and the wheel and the Hub can connect the motor. 1Aluminum Alloy: Omni directional wheel is made of premium aluminum alloy materials, with large friction, light movement, sturdy structure, and stable running process without jumping noise. 2Flexible: All directional movement and rotation, with rotating and lateral mobility, can easily control and track the direction, making the steering faster than ordinary wheels. 3Rolling Bearings: Each driven small wheel is embedded with two accuracy machined rolling bearings, and the driven small wheel shaft clearance is controlled within a small range, which is particularly suitable for various small robots. 4Strong Load Capacity: Each wheel consists of 8 rubber rollers. The load capacity is up to 10KG, and it can supply power independently with better stability. 5Specific Walking Mode: Omni directional wheel can move forward, backward or sideways. Stroke and rotation at any angle with 0 radius.