●Upgraded 7/8 in. ball bearing hangers are now available for you, we insist replacing with nylon encapsulated ball bearing wheels because nylon standard wheel door hangers have been easily worn out all the time. ●Fits for Acme, Cox, Atlas, Stanley and others standard double-J tracks, please check before purchase. This kit will safely hold doors that weigh up to 75-pounds each. ●Compatible with 3/4-in, 7/8-in, 1-1/8-in or 1-1/4-in thick doors with double-J tracks for the installation of a 2-door panel system. ●Use the 1/4-inch offset roller assembly for the front door and the 1/2-inch offset roller assembly for the back door. Housings feature slotted holes for maximum adjustment. ●Package includes 2 pair of top hangers, 2 finger pulls, 1 adjustable floor guide, 1 door stop and 1 screw pack. Perfect replacement part set for sliding bypass doors.