A "Master Collection" traditional double bowl kitchen sink with a rich high gloss finish that is easy to clean with non-abrasive cleaners. Beauty of porcelain with strength of cast iron, yet lighter weight. Insulated construction to absorb waste disposal noise. Large basins for more workspace. Resists stain, rust, oxidation, chipping, and scratches. Surface can be polished with ordinary liquid-based sink, countertop, or auto polish. Drop-in and Undermount ready for quick and easy installation. No mounting clips required for drop-in installation. Plumbers putty for drains and silicone sealant for perimeter is all that's needed. Certified by the Canadian Standards Association and the National Association of Home Builders Research Center. Thermocast Lifetime Warranty.