Create a wall bed that opens smoothly and quietly with these premium piston lift mechanisms. With no springs to break or slacken over time, you'll get years of reliable service. Unlike many other kits, these packages include a sturdy steel mattress platform with comfortable cambered wood slats to support your mattress. Metal legs at the foot of the bed swing out for a level sleeping surface when opened, and the mechanism holds the bed securely closed when not in use. Instructions are included for building a basic cabinet enclosure. Compatible with mattresses up to 10'' thick. Choose from Twin, Full and Queen sizes. Features: Includes tubular steel mattress frame for strength and improved weight distribution Comes with cambered wood slats for comfort Recommended for standard mattress sizes up to 10'' thick No box spring is used Mattress and Lumber not included.