This fireclay sink is kiln-fired at high temperatures of 2200degree(s)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 33-inch fireclay sink gives you plenty of usable space for filling pots, stacking dishes, and preparing meals.