Rozin Dragon Head Dual Knobs Bathroom Sink Faucet with 8 Inch Holes Cover Plate Oil Rubbed Bronze Single Hole Deck Mount,Diameter of hole in sink should be 33mm to 45mm Cold and hot water,with two water supply lines,complete with mounting fittings If you need a sink drain,refer to item(ASIN): B00GZID50I Cover Plate:Allow single hole faucet to be installed on 3-hole sink Rozin provides any replacement in future use,so contact unhesitatingly once you have any problem