KOHLER K-2210-7 Caxton Undercounter Bathroom Sink, Black Black Oval basin with unglazed underside. Overflow drain. No faucet holes; requires wall- or counter-mount faucet. Unglazed underside. Install beneath countertops to combine the look of an integral basin with the benefits of durable vitreous china and many color options Vitreous china Exterior dimensions: 19-1/4-Inch x 16-1/4-Inch Interior dimensions: 17-Inch x 14-Inch Undercounter installation