The locking commercial rail by Stromberg is designed to support those who use your mobile equipment. Whether a field trailer, portable restroom or a support vehicle to your fleet; railings can support over 200 lbs when mounted correctly.The AC-530L rail extends 24" from the coach, and is 38" top to bottom. Made from stainless steel tubing and cast, locking mounting blocks, it is designed for commercial use on a mobile trailer or fleet unit. Stainless steel rails conveniently fold out of the way when not in use.