Artestia 7-1/4" or 9-1/4" Induction Hob Heat Diffuser Aluminum/Stainless Steel Disc with Heat Proof Handle (7-1/4" Disc) Induction Hob Heat Diffuser Aluminum / Stainless Steel Disc with Heat Proof Handle by Artestia This gadget enables non-induction cookware to be used on induction surfaces, so you can use your regular cookware on induction cooktop to avoid unnecessary costs The aluminum / stainless steel disc distributes heat fast and evenly, which improves cooking quality. Built of premium quality aluminum and stainless steel, it's durable. Our improved feature of three little lumps on the bottom of the disc helps protect cooktop from overheating. Induction cooktop generates heat from electromagnetic wave which does not need direct contact of the disc to heat up, the three lumps on the bottom provides space that helps prevent the hot disc from overheating the surface of the induction burner. Very easy to clean and maintain, simply wash with water and dish soap, wipe out water and let it air dry