Durable, one piece, rotationally molded design for increased strength. Constructed of high impact "no break" polyethylene. No steel or wood components. Functions as shelf or step. Bolt to the wall via pilot holes with hardware of your choice. Sound dampening. Easy to clean, sanitize and maintain. Passes Flammability UL 94 HB. Tested to ISO 22196 showing a less than 99% reduction in bacteria. Flame Retardant (passes Cal 133) Test reports available upon request. Manufactured to ISO Quality Standards in the USA.