Description 50mm Omni Wheel - 8mm Bore Provides steel / brass roller wheels covered with rubber Has a diameter of 50 mm Features an 8 mm hole Is made of Aluminum The 50mm Omni Wheel - 8mm Bore has a diameter of 50 mm and an 8 mm hole. View more What's Included 1 x 50mm Omni Wheel - 8mm Bore Dimensions Size Diameter: 50 mm Hole size: 8 mm Specifications Type: Wheel Material: Aluminum Roller wheels: Steel/Brass Roller Cover: Rubber