Excel NSF Multi-Purpose 4-Tier Wire Shelving Unit with Casters, 36 in. x 18 in. x 77 in., Chrome NSF certified for dry storage applications Durable Chromed steel construction with 36 in. X 18 in. Shelves 4 in. X 1 in. Swivel casters / 2 with brakes for easy mobility Each shelf supports 600 lbs when evenly distributed on the ft. Levelers Each shelf supports 150 lbs when evenly distributed on the casters; Total unit weight capacity is 600 lbs when evenly distributed on the casters