? BLANCO 527415 Precis Cascade Undermount Kitchen Sink with Colander - Volcano Gray ? Features German engineered with 304 series, 16-gauge stainless steel Practical 15 mm radius corners for easy cleaning X-pattern drain grooves help quickly remove water from the sink 18/10 chrome-nickel content for excellent durability and corrosion resistance Rear-positioned drain holes maximize cabinet storage space