When replacing your kitchen sink, consider the Thermocast Cambridge Drop-in 33 in. x 22 in. Double-Bowl Kitchen Sink. This sink is designed with the beauty of porcelain and the strength of cast iron with a sleek, glossy black finish. The 2 large offset sink bowls provide you with more workspace. It is designed to withstand temperatures up to 450-degrees Fahrenheit. The insulated construction is resistant to scratching, chipping and impact. To keep the sink's shine you can use liquid sink or countertop polish. Auto polish can also be used.