Whitmor"s Black 5 Tier Shelving Unit offers high quality storage. Each 14"x36" shelf will hold up to 350 pounds when it is evenly distributed. The 1"diameter steel poles offer incremental height adjustments of 1". At the bottom of each leg there are leveling feet that gives the ability to adjust for uneven surfaces. The black epoxy coated steel offers an attractive rust-free surface. The many quality features contribute to the NSF rating that this unit carries. It is approved for all environments. A 10 year warranty reflects the quality of this item.