Double compartment undermount sink. 18 gauge (1.2 mm), type 304 (CNS 18/10) stainless steel. Exposed surfaces are #4 satin finished. Undercoated to reduce condensation and resonance. Includes waste fittings, cutout template, and Universal Installation System hardware. Certified to ASME A112.19.3-2008 / CSA B45.4-08. Center back waste location. Includes 3 1/2" (89 mm) crumb cup strainer with 1 1/2" (DN38) brass tailpiece.