The Pearl Series TL-3099 Porcelain Undermount Sink is constructed from Grade A Porcelain and undergoes a vitreous china coating process, resulting in a glossy yet scratch-resistant finish designed to endure for years. This durable coating is achieved by heating a special type of refined clay to high temperatures. Additionally, this layer is nonporous, providing resistance to stains, fungi, and bacteria growth. The Pearl Series Porcelain Sinks are backed by a limited lifetime warranty, ensuring coverage for as long as the original purchaser owns the home in which the sink was originally installed.