The AstraGranite P218TW is made from a granite composite material that is comprised of 80% Quartz and 20% Acrylic. The P218TW is stain, scratch, and heat resistant up to 550 degrees. The smooth non-porous surface gives the sink anti-bacterial properties, leaving nowhere for bacteria to thrive. 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 AstraGranite sinks are covered under a limited lifetime warranty for as long as you own the sink.