Riopel exquisite books and video drop boxes are made from durable and attractivre 16 gauge polished stainless steel. Chute doors are 11 gauge stainless steel. Loading carts have heavy duty swivel casters and handles for easy and convenient manourability. Units have chutes with 4-1/2" opening capacity. Chute doors have optional lockable feature. If preferred access doors may be located at the rear of the drop boxes.