Rozin Creative Design Single Lever Bathroom Sink Faucet with Cover Plate Brushed Nickel mixer tap Single Hole Deck Mount,Diameter of hole in sink should be 33mm to 45mm Cold and hot water mixing,with two water supply lines 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