Single compartment self rimming drop-in sink less faucet ledge. 18 gauge (1.2 mm), type 316 (EN1.4401 17/12/2) stainless steel. Exposed surfaces are #4 satin finished. Undercoated to reduce condensation and resonance. Includes waste fitting, factory applied rim seal, cutout template, and factory installed EZ TORQUE™ fasteners. Certified to ASME A112.19.3-2008 / CSA B45.4-08. Wheelchair accessible: meets ADA (Americans with disabilities act guidelines) and ANSI A117.1 (Accessible and usable buildings and facilities). Check local codes to ensure compliance. Center waste location, 3 1/2" (89 mm) type 316 (EN1.4401 17/12/2) stainless steel crumb cup strainer with 1 1/2" (DN38) type 316 (EN1.4401 17/12/2) stainless steel tailpiece.