Hardware is made of carbon steel with a black finish; Only hardware for sale,wooden ladder sold seperately. A complete set of hardware including: 2X3.3ft rail with 2 brackets; 2X Top wheels; 2X Stops; 2X End caps,2X brake wheels, set screws and a hex key. The brackets are welded to the track; The distance between the two brackets: 19 11/16", the bracket length is 3 1/8". When climbing the ladder, step on the brake pads to play the role of brake fixation. It will be safer for people to get on and off the bus. Release the brake pads and the ladder can move laterally.