The Ladder for Wall Bunk features a durable, one piece, rotationally molded designs for increased strength. Constructed of high impact "no break" polyethylene. No steel or wood components. Smooth, curved surfaces free of pass-throughs for ligature resistance. Bolt to Endurance Wall Mount Bunks with tamper-resistant hardware provided. Easy to clean, sanitize, and maintain. Passes Flammability 94 HB. Tested to ISO 22196 showing a greater than 99% reduction in bacteria. Manufactured to ISO Quality Standards in the USA.