This is 5 tier wire shelving, you only need to spend 15min to install it. The shelving unit is made of steel wire shelving. It’s NSF certified. The maximum weight capacity per shelf is 150 lbs when equally distributed on feet levellers. The maximum entire unit weight capacity is 220 lbs when equally distributed on casters. You can use the feet levellers or wheels to suit your needs. The storage shelves provide an enormous amount of space for you. You can use this metal shelf in the kitchen bedroom garage. This wire shelving can make your room tidier.