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 sink offers two installation options - drop-in or under-mount - giving you flexibility for a range of bathroom configurations. Large rectangular basin. No faucet holes; requires wall- or counter-mount faucet. Overflow drain. Drop-in or under-mount. KOHLER® enameled cast iron.