Designed to keep ribs off the bottom of the roasting pan and steaming in their own juices, or other flavored liquids. Ribs cook completely and stay moist in far less time. The foil rib roaster can be used as a stand alone item, or as liners for the Cast Rib Roaster to keep it clean while in use. 5.5" x 16" x 4" of usable space. Pack of 2.