Prime-Line N 6630 Door Roller, 1-1/2 in Dia Roller, Bottom Mounting, Steel

N 6630 is a Paneled Mirror Door roller assembly with a concave nylon roller. Used on Monarch Mirror Doors "L" Series, the grooved ball bearing nylon roller provides a smooth ride as it slide back and forth. The flat nylon roller is 1-1/2 in Dia. Note that the adjusting screw is centered on the top of the housing and the tabs on either side will insert into slots on that side and will be held in place by the existing screws.