Prime Line M 6152 Shower Door Roller 4 Pack

4 pack, shower door roller, 3/4 in. diameter, flat edge nylon tire, steel ball bearings, threaded hex head hub. constructed of nylon and come with threaded hex head hubs and steel ball bearings. they are designed for use in standard tub-enclosure shower door systems and they are used by many shower door manufacturers. these rollers restore smooth operation to sliding shower doors. rollers like these are also available with round edge tires and others with threaded nut fittings.