Demeyere Apollo 8.9 Quart Casserole with Lid Classic, straight-sided 8.9-quart casserole made with stainless steel and 7-layer base 5mm pure aluminum in base for optimal heat distribution; brushed 18/10 stainless-steel walls Molded handles made of 18/10 stainless-steel stop heat conduction; no rivets where food can stick Dishwasher safe; oven safe to 600 degrees F; for all cooktops including induction; made in Belgium 30-year warranty against defects; diameter of base measures 10.2 inches