2 Pcs 3/8" x3/8" Male + 2 pcs 3/8" x3/8" female NPT brass nipple is made of high quality solid brass, firm and durable, providing high resistance to abrasion and corrosion. Solid brass hose barb can withstand up to 250 °F) Brass adapter fittings for connecting hoses, used to connect NPT brass or iron pipe Corrosion resistant which can apply to water, gas, oil and fuel as well as air tools. Hex nipple for connecting two threaded pipes and fittings with same diameters Contain low lead and prohibited to install for potable water use in the USA by federal law. 2 Pcs 3/8" x3/8" Male + 2 pcs 3/8" x3/8" female NPT brass nipple is made of high quality solid brass, firm and durable, providing high resistance to abrasion and corrosion. Solid brass hose barb can withstand up to 250 °F) Brass adapter fittings for connecting hoses, used to connect NPT brass or iron pipe Corrosion resistant which can apply to water, gas, oil and fuel as well as air tools. Hex nipple for connecting two threaded pipes and fittings with same diameters Contain low lead and prohibited to install for potable water use in the USA by federal law.