Four adjustable triple-truss wire shelves 3" commercial castor wheels with two that lock for safety Height adjustable non-rolling/stationary feet included, allows shelving to hold up to 600 lbs. per unit NSF rated for food safety Shelves adjust at 1" increments. Buy this product and Save $144.98 Off on 4-Shelf Commercial Steel Wire Shelving Rack w/ Casters for $55 after promo code MASTERPASS2 with free shipping at Rakuten.com.