Faucet Hole:2 Holes Formed of #18 (1.2mm) gauge bowls featuring a #20 (0.9mm) gauge deck, type 304 nickel bearing stainless steel. Top Mount. DESIGN FEATURES Bowl Depth: 9-3/4' (248mm) to 10-3/4' (273mm). Contoured Raised Rim: 3/8' (10mm) to 1-3/8' (35mm) above outside edge of sink. Finish: Exposed surfaces are polished to a lustrous satin finish. Maximum countertop thickness: 1-3/8' (35mm). Underside: Fully protected by heavy duty Sound Guard undercoating to prevent condensation and dampen sound. Drain Opening: 3-1/2' (89mm). NOTE: Unless otherwise specified, sink is furnished with 3 faucet holes. Sink does not comply with ASME A112.19.3.