54"H AV Cart - Three Shelves. In addition to a maximum weight capacity of 400 lbs., this 54"H AV cart has 35" of clearance between the top and middle shelf enabling you to store large AV equipment and more. All three shelves offer a .25" retaining lip to secure items in place and are made from a molded plastic that won't stain, scratch, dent or rust. Four 4" full-swivel casters, two with locking brake, provide smooth maneuverability, and an ergonomic handle molded into the top shelf with integrated three-outlet UL-Listed electrical assembly offers convenient access to power.