This versatile wire shelving unit offers a great storage space for your belongings. All the shelf is can adjust height. The shelving unit is made of steel wire shelving.The weight limit for each shelf is 90 pounds, and the total weight limit for the entire shelf is 450 pounds. Big space of this metal rack can storage many stuffs to make sure your home or office or kitchen or garage or warehouse is tidy. The 5 tire wire shelving unit offers remarkable strength, convenience, and versatility.