For door panels 3/4 to 1-3/8 in thick, weighing up to 60 pounds each. Hanger system allows for easy panel removal and adjustments. Vertical adjustments can be made after installation. V-groove track for smooth, quiet operation. Self-aligning wheel system. Conforms to ANSI A156.14 Type D8742. Includes galvanized steel track, single wheel hangers, floor guide and finger pulls. Boxed.