20.25 Inch Drop-In Ceramic Vanity Sink
Nantucket Sinks' Self Rimming Drop-In Oval Bathroom Sink in White.  This sink has a 1.75" drain diameter.  Easy drop-in topmount installation with 3 holes for faucet.  A deeper 6.75 inch interior basin makes it super practical.  Made of vitreous china and sealed with an enamel glaze for a high gloss finish.