Black polyurethane light duty skater castor with fixed plate and total brake. The thin wheel width reduces the friction allowing the load to move more freely. Plastic Rim Ball bearing Wheel Size 75 x 23mm Overall Height 100mm Fixing Plate 60 x 60mm Bolt Hole distance 38 x 38mm / 46 x 46mm Load Capacity 60kg (dynamic) Offset 28mm Wheel Colour Black Housing Colour Black