Whitehaus WHFLCON2018 20-Inch Reversible Series Fireclay Sink with Concave Front Apron One Side and Fluted Front Apron on Other silicone Imported 3 1/2 inch center drain must use the following RNW35L RNW50L or WH202 Sink is finished on all four sides Matching grid WHREV2018 Recommended that sinks be on site when cabinets are being ordered Sink is finished on all four sides 3 1/2" center drain Drains RNW35L, RNW50L, or WH202 must be used