The S218TW is made from a granite composite material that is comprised of 80% Quartzite and 20% Acrylic. Silver ions, added to the sink during the manufacturing process, kill 99% of bacteria on contact. The S218TW is stain, scratch, and heat resistant up to 550 degrees. The overall dimensions of the sink are 33" x 22" x 10 3/4" and a 36" minimum cabinet size is required. The sink features a low divide, multiple punch-out faucet holes, and a 3 1/2" offset drain. As always, our TruGranite sinks are covered under a limited lifetime warranty for as long as you own the sink.