Unit shall be of fully welded unitized construction with an overall carrying capacity of 500 pounds. Corner legs shall be of 16-gauge angle stainless steel. Shelves shall be of 20-gauge stainless steel with long shelf edges double hemmed for extra strength, and shall be electronically spot welded to upright legs at all points. Unit shall have a stainless steel push handle welded to frame, and shall have corner bumpers mounted to front legs and ends of push handle. Unit shall have an independent galvanized steel dolly frame fastened to the bottom with 8 screws. Unit shall have 4 each 5” diameter swivel casters with non-marking polyurethane wheels. Welded assembly shall have triangular stainless steel reinforcing gussets welded to four bottom corners. Top shelf shall have 16-gauge angle reinforcements welded to long shelf edges.