This item has been used for about six months and has been used over a gas stove, so the back of the frying pan has some discoloration and scratches, and there are also some burnt marks on the bottom of the pan. Since it's only been six months, food doesn't stick to it at all, and the handle doesn't wobble. It's perfectly usable! Regular Teflon-coated frying pans have a smooth surface that gives the impression of being coated, but the surface of this frying pan feels rough. It also has a 4-layer structure, and the heat transfer is better than regular Teflon frying pans, giving the impression that it heats up quickly. Also, because it's Teflon-coated, food doesn't stick, and it's easy to clean. Metal spatulas are OK. Weight: 980g. The bottom of the pan is about 20 cm. The following is quoted from the website... Compatible heat sources: gas stove, induction cooker, radiant heater, sheathed heater, halogen heater, plate heater Materials: Body: 4-layer clad material (aluminum, stainless steel, aluminum, stainless steel) (bottom thickness 2.0mm), Inner surface: Fluororesin coating (Teflon profile processing), Outer surface: Mirror finish, Handle: Phenolic resin Compatible with all heat sources such as induction cookers, gas stoves, and electric heaters, and is especially compatible with induction cookers. If you have any other questions, please write them in the comments section. Thank you.