This is a vintage Pyrex F-14-C B Glass Original Dome Casserole Lid. It is a large oval lid made of clear pressed glass with a glossy finish. The lid has one compartment and is dishwasher safe. The item dimensions are 12.5 inches in length, 10 inches in width, and 3.25 inches in height. It weighs 2.63 pounds and is an original production of Pyrex. The lid is unboxed and has an impressed backstamp.