We use brass, a corrosion-resistant, compact, and uniform material, very durable and stable. It is lead- and zinc-free, so it is harmless to health. Pull-down kitchen faucet with 3-function brass spray: anti-splash aerated stream, rinse stream, and powerful stream. G9/16 mounting, compatible with most sinks. We can configure an additional adapter (from 9/16" to 1/2"). Mounting hole diameter: 12" to 18.3". Maximum countertop thickness: 17". Total height: 16.9". Spout height: 10.2". Spout reach: 19.8 cm. Note: Water marks may form in the faucet, as we have conducted comprehensive leak tests before packaging.