The WMF Collier cookware set is made of Cromargan 18/10 stainless steel. The encapsulated base will heat-up quickly, cooks evenly and delivers superb cooking results. Other features include a rolled rim for accurate pouring, heat-resistant glass lids that are oven safe up to 350 degrees . This collection can be used on all cooktops including induction. Dishwasher safe, but hand-washing is recommended to preserve the product.