The NS09i-16 stainless steel undermount is a perfect small rectangle kitchen sink. An ideal single bowl for the smaller kitchen applications. Crafted from 304 16 gauge Stainless Steel. 3.5" drain opening. Comes with a coordinating colander drain as well as a bottom grid to extend times between polishing your sink. Rubber padding is applied for noise reduction. Features a limited lifetime warranty and brushed stainless finish.