stainless stell EASY TO INSTALL This Single Hole Deck Mounted Arc Sink Faucet Can Easily Connected to Your Water Supply System or RV with an Adaptor; Diameter of Hole In Sink Should Be 18mm to 38mmHOT/COLD WATER SINGLE FAUCET: It Can Be Hooked to Either the Hot or Cold Water Line, But There Is Only One Handle, So It Would Not Work for Both hot and Cold At Once; High Arch Gathers Water Together and Concentrates No Splash, Environmentally Friendly, Controllable, No Waste THREADESIZE: 1/2 Inch US Standard Chrome Plated Threaded, You Can Connect It to Garden Hose, Dishwasher, Kitchen Sink, Dock Sink, Washtub Sink, Special for Outdoor Faucet, Like Boat, Camper Or Other Place EASY TO OPERATION: The Kitchen Faucet Is 10 Tall, Single Handle Design Integrate to Control Water Flow Volume Easily, High Arc 360 Degree Swivel Spout SupplFull Range Washing AccessQ: What is the length of the threaded area A: It is 1.8 inches (4.5cm)Q: WhaSIZE hole do I need to drill in the counter top A: 3/4 inch Q: What is the compatiblSIZE of the hole for the cold water dispenser A: The one hole installation fauceCompatible with1/2 inch hole Q: Does the aerator come off and wilWe be able to attach a portable dishwasher adapter t This faucet A: Yes, you can attach a portable dishwasher adapter. Q: Is it can be used on boat or fish cleaning station A: You can use it on your boat, your camper, your garden, even your marine, some other outdoor area Q: When using with an ro system is the faucet so thick that water would tend to dribble out A: Yes, It can be fed by a a standard garden hose and provides ample water pressure of its intended purpose.