The Alvin® Blueprint Mobile Rack is a space-saving vertical filing system that allow convenient access to hundreds of active documents, prints, and project files. Sturdy steel frames adjust to the length and width of the documents being stored. Hanging blueprint clamps (sold separately) are suspended between support bars at each end. They are made with industrial strength with a 240 lb. maximum capacity. The Blueprint Mobile Rack will fit hanging clamp sizes 24", 30", and 36". Height is adjustable from 36" to 48" and unique steel handles allow for easy mobility on heavy duty 3" casters. Floor guides are included for stationary use. The durable barley color powder-coat finish is attractive and will last through sorting and scratching of blueprint hangers. Blueprint Storage has never been easier & more efficient.