Maximum working pressure of 150 psi at 70 degrees F,Material: 304 stainless steel | Shape:Reducer Bushing(Male x Female),Connection:NPT-NPT,Measurement:optional | NPT thread for creating tighter seals than straight threads | It has male NPT threads on one end and female NPT threads on the other for connecting to a female and a male threaded pipe or fitting. | This adapter fitting connects pipes or fittings with different end types, diameters, or materials