FDA approved rotation-molded high-density polyethylene. Reinforced full-length steel-on-steel hinge mechanism. Molded in graphics and safety messages in five languages. Concealed pneumatic cylinder and hinge structure provides controlled, slow opening and closing of bed. High-density polyethylene is easy to clean and resists odors and bacterial growth. Complies with ASTM static load performance requirements when properly installed. Rated to support a static load of 300 pounds (136 kilos); tested to 400 pounds (182 kilos).