Rozin Brushed Nickel Single Handle Basin Mixer Tap Bathroom Sink Faucet with 8" Holes Cover Plate Single Hole Deck Mount,Diameter of hole in sink should be 33mm to 45mm Cold and hot water,with two water lines and complete with mouting fittings If you need a sink drain,refer to item(ASIN):B00MBEERSY 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