Pylex 13905 5-Steps Steel Stair StringSteel 5 step stringer allows the construction of a sturdy and durable staircase. This one piece designed stair stringer can accommodate a steel, fiberglass, or wood stair tread (wood use two 2 in x 6 in boards or one 2 in x 12 in board). Lightweight and easy to install, no cuts required. The baked powder coated finish for excellent rust resistance. Ideal for a 45 in high structure, it is also suitable for a structure between 41 in and 48 in height.