Unused. Compatible with gas stoves. I realized it wasn't compatible with IH (induction heating) after opening the box, so I can't use it and am listing it for sale. This is a 12-piece set with a detachable handle design, including convenient kitchen tools. - Brand: T-fal - Set Contents: Frying pan 22cm, Frying pan 26cm, Saucepan 18cm, Fresher Kitchen Knife 16.5cm, Fresher Kitchen Knife 15cm, Cutting board, Peeler, Turner, 3 lids - Features: Detachable handle design - Quantity: 12-piece set Thank you for looking.