National Hardware N174-136 Box Rail, Steel, Galvanized, 12 ft L

Designed for doors weighing up to 450 lb. One-piece, mounted design allows fast, simple installations without mounting brackets. Features a durable, white prefinished cover that is permanently welded to rail. Flashing pre-punched for attaching to 2 x 6 in track board with 2-1/2 in ring shank nails with neoprene washer.