Made of superior quality 304 stainless steel. Free from rust and tarnishing,corrosion ressistant. Three sheet pan bottom,middle sheet is made of aluminium,which could avoid burnt food because of noneven heat,also stock cook heat Three size:20CM,24CM and 28CM Special material handle for preventing users from scald. Induction,gas,electric,ceramic,halogen compatible. Free from rust and tarnishing.