Organize efficiently with our RW Base 4-Tier NSF Green Epoxy Shelving Unit. These robust steel storage shelves can support up to 450 pounds each. The green epoxy coating resists corrosion, making them ideal for humid conditions like walk-in coolers or freezers. The vertical ribs of these NSF-certified shelves ensure stability to these wire shelves to prevent tipping. With a vented design, these shelving units promote airflow and minimize dust accumulation, keeping items fresh. To adjust the shlef heights, this kit includes posts and 32 split sleeves. Plus, the casters in this kit make the shelves easy to move. Each shelf measures 18 inches by 29.9 inches by 1.5 inches, with posts standing 74 inches tall. The casters measure 5 inches in diameter. Each order includes 4 shelves, 4 posts, and 4 casters.