With its gently curved, organic shape, the Iron Plains sink combines distinctive style with the extreme durability, strength, and vintage soul of KOHLER® enameled cast iron. This vessel sink features a smooth enameled interior with a matching painted underside that makes for a striking vessel installation. Elevate your experience with KOHLER. Kohler®, 5400-PFG-34, Bathroom Sink, Enameled Cast Iron, Fresh Green Exterior with Fresh Green Interior