This fireclay sink is kiln-fired at high temperatures of 2200°F and features solid core construction that makes it highly resistant to impact and thermal shock. at the same time, using advanced glazing technology to create a durable non-porous finish, against scratches, rust, and stains that will not yellow or fade over time. These properties make fireclay sinks a superior choice compared to alternative materials such as cast iron enamel and ceramic sinks which can easily chip or crack. The 27-inch fireclay sink gives you plenty of usable space for filling pots, stacking dishes, and preparing meals.