Long-Lasting:Angle stop valve is made of lead free brass and a chrome-plated finish,which is resists corrosion and rust.And uniform Plumbing Code (UPC) Certified and Approved,that comply with drinking water standard. Connection Size:Inlet Connection: 5/8" compression fits 1/2" pipes.Outlet Connection: 3/8" compression fits 3/8" water hose for toilets and faucets. Product Compatible:GUOFIS angle shut-off valve are compatible with copper or Pex Water Pipes,also available in Pex Valve.Easy to install on the pipe supply lines for toilets and faucets. Working Features:If you are replacing fixtures,or need to repair a single appliance in your home that uses water,you can just turn off the angle stop valve that provides water to the appliance.This allows you to make your repairs without having to turn off all the water in your house.It also allows other appliances to continue being used. Package Includes:Include 20 pack 1/2 Nom. (5/8" OD Comp)x 3/8" OD Comp with 1/4 turn on/off angle valve.Suit for residential and commercial applications for hot and cold water.