Patented ‘Total’ Hi-Low Food Release System. It’s more than just a non-stick; it’s a combination of an improved hi-low wave technology and the most advanced non-stick formula. Lab tests prove it outlasts all other non-sticks. Heavy gauge hard-anodised for outstanding durability and even heating, ensures no hot spots that will burn foods. Ergonomically designed stay cool phenolic handles are slip-free. Oven safe to 350°F/180°C/Gas mark 4. Thick aluminium core base provides fast, even heat distribution. Polished stainless steel lids form a tight seal to trap flavour and nutrients. Advanced non-stick exterior for easy cleaning. Suitable for gas and radiant ring heat sources. Diameter measures approximately 30cm. Lifetime customer satisfaction guaranteed.