The thickened sintered stone countertop offers excellent scratch resistance, superior water resistance, fire resistance, moisture resistance and high temperature resistance The high-quality undermount rectangular ceramic basin is fired at high temperatures, it is smooth and stain-proof and durable, no dead corners and making it easy to maintain. The basin is designed with a standard size pre-drilled faucet hole and an overflow hole to prevent leakage or spillage. The sink drain stopper with overflow hole is recommended.