9mm plywood construction with PVC exterior Red Penn Elcom recessed MOL twist latches and spring-loaded rubber-gripped handles Heavy-duty Penn Bright zinc-plated hardware and reinforced stackable ball corners 3.2mm thick front & rear rack rails Tongue & groove extruded aluminum valance Mobile 19" console rack with pop-up top-loaded rack Top rack uses a pop-up ratchet system for transporting flat then elevating to various angles 4" heavy-duty industrial casters, 2 of which are locking 2 spring-loaded recessed handles on each side for easy lifting to stage or truck