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 large trough-style bathroom sink has an Iron Black painted underside, which allows for a striking vessel installation as well as drop-in or under-mount installation. Large rectangular basin. No faucet holes; requires wall- or counter-mount faucet. Overflow drain. Vessel, drop-in, or under-mount. KOHLER® enameled cast iron.