The product is a set of 16 round 4" mini tart pans made of black carbon steel with a non-stick surface coating. These tart pans are dishwasher safe and have a depth of 3/4 inch. They do not come with removable bottoms. The manufacturer does not offer a warranty for this product. Perfect for baking and serving small tarts or quiches, this set is ideal for any home baker looking to create delicious desserts with ease.