Anderson Metals Red Brass Pipe Fitting, Close Nipple, 1" NPT Male, 1-1/2" Length Close nipple for creating a close fit between connecting pipes Male National Pipe Taper (NPT) threads for connecting to female threaded pipes Red brass for high strength, ease of machining, and better corrosion resistance than stainless steel Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F) Meets specifications ASTM B584 and ASME/ANSI B16 for quality assurance These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories.