The rare Seal-O-Matic Thermium 4-piece steamer and double-boiler pan set, crafted from heavy-duty stainless steel, offers durability and efficient heat distribution. Ideal for steaming vegetables and tempering chocolate, this set ensures consistent, gentle cooking, enhancing flavor and texture for various culinary applications.

Note: the lid did not originally come with the pan set, but it is from the same era and fits perfectly!