Kohler K-9135-2BZ Tile-In Round Shower Drain, Oil Rubbed Bronze Features durable construction and KOHLER quality; tarnish resistant Offers an inside tailpiece for 2-inch drains and an outside tailpiece for 3-inch drains Designed for tile-in applications Oil Rubbed Bronze is a chemically darkened surface, designed to simulate aged bronze. This finish is very dark, near black, with copper undertones.