... Wheel drive: 75mm Wheel width: 32mm Installation height: 105mm Model: MD-SPZ-7532PP- DBSpecification: 3 inch flat-topped eventsWheel material: PPLoad ... turn around. Screw installation, more tight and easy install, Model: MD-SPZ-7532PU- DBSpecification: 3 inch flat-topped eventsWheel material: PULoad ... installation, more tight and easy install, 3" swivel industry caster MD-SPZ-7532PU- DB