Reinfoced steel strapps add strength and durability. Choose Lincoln Wear Ever Professional roast pans for medium to heavy roasting needs. NSF approved for commercial use. Extra dent resistant 3004 Aluminum Alloy. 4482 12 and 4483 12 pans have six lugs that enable these pans to function as covers. Loop handles. Superb strength. Please allow 1 week to 10 days for delivery of this item.