163590 This by-pass sliding door track kit is constructed of the following materials; a galvanized steel track, plastic wheels and floor guides, steel bracket assemblies and two 3/4 inch finger pulls. The 4 adjustable roller assemblies included with this kit feature 7/8 in. outside diameter wheels and together will support doors weighing up to 30 pounds each. This kit is designed for use with by-passing closet door systems and it is used by many manufacturers. All fasteners necessary for the installation of this kit are included in packaging.