About This MATERIAL: Heavy duty forged brass, thicker, threads are deep and accurate, stronger and durable. SIZE: 3/8" Male NPT x 3/8" Male NPT thread. FUNCTION: Equal diameter hex nipple for connecting two female threaded pipes with same diameters. FEATURES: Forged brass fittings, corrosion resistance, ductility at high temperatures, and low magnetic permeability. Operating temperatures range from -53 to 121℃ (-65 to 250 ℉). WIDE APPLICATION: Apply to home plumbing pipes, grease, fuels, natural gas, refrigeration, instrumentation, hydraulic and other applications. NOTICE: Reducing Hex Nipple is coated with red glue, which makes it tighter, not easy to leak, but we also have an extra Teflon tape. Overview Size : 3/8" MNPT(Sealant) Material : Brass Brand : GASHER Color : Yellow Exterior Finish : Brass Thread Type : NPT Item Weight : 0.25 Kilograms Number of Pieces : 10 Manufacturer : GASHER