The black undermount kitchen sink is made of dent-resistant T304 stainless steel in TRU16 real 16-gauge for superior strength and durability.Nano brushed stainless steel is great for preventing scratching and stain resistant.The performance is higher than the general nano, anti-steel ball, anti-physical scratching, anti-pot bowl bump. This undermount kitchen sink with gunmetal matte black NANO brushed finish, works like water on Lotus leaf - no water trace left .Very easy to clean,anti-freezing heat and non-seepage water ,1000℃ high temperature do not fade. Bottom Slope and X water guideline is good for water drainage.Thick gauge stainless steel is coated painting underneath with rubber pads to help make it even quieter/reduces sounds from dishes or whatever is being put in sink or washed! Undermount Sink Size and Package Included : 331910 (minimum cabinet size is 36 inch); The package comes with a black undermount kitchen sink, bottom rinse grid,drain strainer