Unit shall be of fully welded stainless steel construction. Legs and frame shall be of U-frame design, eliminating the need for corner reinforcements. Shelves shall be of 14-gauge stainless steel, and shall be continuously TIG welded to vertical leg frames. Shelves shall be reinforced front and back with 18-gauge angle welded to the shelf underside. Unit shall have two each 5” (127 mm) diameter extra-load swivel casters with 1-1/4” (32 mm) wide non-marking polyurethane wheels, and 2 each 8” diameter extra-load wheels mounted to a fixed axle. Swivel casters shall be plate type and shall be bolted to an 18-gauge 5” wide stainless steel cross member with a galvanized reinforcement. Unit shall have push handle made of 18 gauge 1” O.D stainless steel tubing. Handle mounting brackets shall be continuously TIG welded to vertical leg frame. Unit shall have two each bumpers mounted to handle ends and two each 6” (152 mm) bumpers riveted to front legs. Unit shall be NSF listed.