Prime-Line D 1556 Sliding Door Roller Assembly, 1-1/2 In. Plastic Wheel, Steel Ball Bearing Roller (Single Pack)

Used to repair patio sliding doors with missing, damaged or malfunctioning roller assemblies, Concaved (grooved) edge wheels designed to glide on a single raised aluminum or steel track, Adjustable steel housing with a 1-1/2 inch plastic wheel and steel ball bearings, See manufacturer model number D 1579-1 stainless steel repair cap for damaged tracks, Used by Northrup aluminum glass doors and similar styled patio sliding doors