The Alvin® Blueprint Pivoting Mobile Rack is a space-saving vertical filing system that consists of a sturdy steel frame supporting 12 pivoting brackets that swing freely to allow visibility and easy access to hundreds of active documents. The Blueprint Mobile Rack will hold up to 12 hanging blueprint clamps (sold separately). They are made with industrial strength with a 240 lb. maximum capacity. The Blueprint Mobile Rack will fit hanging clamp sizes 18", 24", 30", and 36". Mounted on four 3" locking swivel casters, the rack rolls easily wherever needed, making it ideal for office and field use. The height is adjustable for storage of prints from 24" to 48" long. The depth is adjustable for storage of prints from 18' to 36" wide. The durable barley color powder-coat finish is attractive and will last through sorting and scratching of blueprint hangers.