Hyper Tough 4 Tier Wire Shelf Unit is ideal for home and commercial use. It has strong and durable welded wire construction. Open wire design allows air circulation and reduces dust build-up. NSF certified for dry environment. Shelves can be adjusted in 1 increments. Each shelf can holds up to 600 lb evenly distributed when assembled with feet levelers. Total weight capacity when assembled with casters is 500 lbs (125 lbs per shelf). This wire shelving system also includes 4pcs plastic shelf liners. It can provide a smoother surface for your wire shelves and prevent smaller items from falling through. This wire shelving system is perfect for homes, offices, warehouses, kitchens, restaurants and any other places you need to organize. Commercial grade steel construction. Easy assembly with no tools required. 4 heavy-duty shelves (18″x48″). Shelves adjust in 1 increments. Includes one set 3 casters with 2 locking wheel. Includes 4 pcs adjustable foot levelers for uneven floors. Includes 4 pcs shelf liners to prevent small items from falling through. Assembled size: 18″Dx48″Wx72″H with feet levelers, 18″Dx48″Wx75″H with casters. Weight capacity on casters (evenly distributed): 500 lbs total (125 lbs per shelf). Weight capacity on feet levelers (evenly distributed): 2400 lbs total (600 lbs per shelf).