Any cookware in your kitchen that features a magnetic base can be used on an induction cooktop surface. Common induction-compatible cookware includes cast iron and certain types of stainless steel. Stainless steel pots and pans that have had nickel added to them are non-magnetic and can't be used with induction cookware. Common types of magnetic stainless steel include 430 stainless steel and 18/0 grade. To test your current cookware, you can simply hold a magnet up to the bottom of the pot or pan. If it strongly sticks, then that piece will work. If you’re purchasing new cookware, look for any type of “induction compatible” labeling.