This Houzer Porcela 31 in. Mint Porcelain Enamel Steel Undermount Single Bowl Kitchen Sink offers the high-end look of cast iron with all the benefits of a lighter steel core making it easy to install and maintain. The porcelain enamel is twice-fired at 1500 degrees F resulting in a perfectly smooth surface that is stain, chip, and scratch-resistant. Other sizes available. $301.68. Free shipping. Buy here.