Prime-Line 3/4 in. D White Nylon Tub Enclosure Roller 2 pk

M 6000 is a 3/4 inch tub and shower door nylon ball bearing roller with an oval edged wheel. It has a threaded hex head hub that uses an 8-32 x 3/8 inch long Philips binder head machine screw to fasten it to the door bracket. Used on many different tub and shower top roller systems.