Superior quality Stonehenge Granite 18 gauge (1.30mm), 304 Series, 18/10 Chrome/Nickel, stainless steel sinks. Sturdier than comparable 18 and thinner 20 gauge metals, Sinks won’t flex under pressure. Sound deadening quiets the sink against the tinny echo of pots and silverware and the brushed satin finish resists scratching, water spots and staining for a lifetime of maintenance free functionality.