Stainless steel, easy to install. This single-hole mounted high-arc sink faucet easily connects to your water supply or RV with an adapter; the hole diameter on the sink should be 18 mm to 38 mm. Single hot/cold water mixer: It can be connected to either the hot or cold water line, but it only has one handle, so it cannot be used for both hot and cold water; high arc for water collection and concentration, no splash, environmentally friendly, controllable, no waste. Thread size: 1/2-inch US standard chrome-plated thread, you can connect it to a garden hose, dishwasher, sink, mixer, basin faucet, especially suitable for outdoor faucets such as boats, RVs, or other places. Easy to use: The kitchen faucet is 25 cm high and is designed with an integrated handle for easy adjustment of water flow, and the high 360-degree swivel spout allows for complete cleaning. Q: How long is the threaded part? A: 4.5 cm. Q: What size hole do I need to drill in the countertop? A: 19 mm. Q: What is the compatible hole size for the cold water dispenser? A: The single-hole mount faucet is compatible with 1/2-inch holes. Q: Is the aerator removable? Can we connect a portable dishwasher adapter to this faucet? A: Yes, you can connect a portable dishwasher adapter. Q: Can it be used on a boat or fish cleaning station? A: You can use it on a boat, in an RV, in the garden, or even some other outdoor area on a boat. Q: When used with a reverse osmosis system, is the faucet too thick, causing water to drip easily? A: Yes, it can be supplied with water from a standard garden hose and provides sufficient water pressure for its intended use.