Slide-Co 163589 By-Pass Wardrobe Track Kit, 48 in. Opening, Dial-Adjusting Rollers, Steel, 7/8 in. Plastic Wheels This kit is used for the installation or replacement of by-passing sliding closet door systems Track dimensions are 48 in. wide x 1-1/16 in. height x 1-9/16 in. depth. This kit uses 7/8 in. outside diameter wheels Adjustable roller assemblies are constructed of stamped steel brackets and will fit 3/4" to 1-3/8" thick doors Constructed of a galvanized steel track, plastic wheels and floor guide, steel brackets and 2 brass 3/4 in. finger pulls