Reducing Adapter, Tube Fitting Material Wrot Copper, Fitting Connection Type C x MNPT, Tube Size 1-1/2 in, Pipe Size - Pipe Fitting 1 in, Outside Dia. 1-5/8 in x 1 in, Max. Pressure 408 psi @ 100 Degrees F, Temp. Range -20 Degrees to 400 Degrees F, Standards ASME/ANSI B 16.22