National Hardware N105-726 Box Rail, Steel, Galvanized, 1-57/64 in W, 2-13/32 in H, 8 ft L

Designed for use on doors weighing up to 450 lb. Rail drilled 24 in OC for brackets. Can be used with many types of single and multiple brackets. Screws included. Meets ANSI/BHMA A 156.14, Grade 1. Rail is formed to give an even tread to hanger wheels.