Heavy gauge hard anodized - heat quickly and distributes heat evenly, reducing hot spots. Patented Circulon Total Hi-Low Food Release System - proven to provide outstanding non-stick performance. Unique surface of raised circles with DuPont non-stick, reduces abrasions for durable performance, extraordinary food release and easy clean up. Metal Utensil Safe. Riveted Steel Handles - double riveted for extra strength and versatility. Oven Safe 180°C / 350°F / gas mark 4 with lids, Oven Safe 260°C / 500°F / gas mark 9 without lids. Induction Base - suitable for ALL hob types Shatter resistant glass lids - monitor cooking while sealing in heat and moisture. Circulon Lifetime Guarantee. Diameter: 34cm.