Metal A-Framed work great with Multi-Position letter sorting machines to accommodate three-sided and four-sided plastic letter trays. Shelves tilt back and to the side, creating an angle that keeps mail vertical in the trays. A-Frames can handle the busiest environments, and are used in sweeping operations. A-frame carts feature all steel construction, 16 letter tray capacity, over 500 lb. capacity, 4" all-swivel casters, and baked enamel finish.