(1)QLM-25 Specifications: Model Number: QLM-25 Diameter: 254mm Width: 133mm Number of Rollers: 8 Number of Bearings: 16 Hub Material:Steel Roller Material: Polyurethane Hole size: 45 Weight: 11Kg Load Capacity: 450Kg (2) Usage: robot , robot platform rotate to omni directions, heavy duty omni moving robot platform scientific research , material handling equipment robot wheel show equipment on stage or show cars wheelchair, transfer conveyor , shipping carts ,luggage and so on (3)Specifications : Making turning fast Omni directional movement and rotation Superior load capacity for more information about the drawing and pictures, please contact omniwheel(at)hangfa.com