7 ft Galvanized Wall Channels pack of 6 channels 7 ft. long wall channel CM54. Removable side stall walls can be made using our 7 ft. long wall channel designed to accept standard 2 inch lumber (1 1/2 inch thick). Attach the wall channels to your support posts or walls and slide the lumber into the channels. Measures 7 ft. long x 1 1/2" wide x 1 1/2" deep. Color- Silver