Demeyere Apollo 8.5 Quart Deep Stockpot with Lid Classic 8-1/2-quart stockpot 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 8.7 inches