Eliminate the need to flare, solder, or otherwise prepare tubing before assembly with this PARKER male connector. - The compression fitting is suitable for use with annealed copper, aluminum, and thermoplastic tubing where excessive vibration or tube movement is not involved. Tube Fitting Material / Brass Fitting Connection Type / Compression x MNPT Pipe Size - Pipe Fitting / 3/4 in Tube Size / 3/4 in Compression Thread Size / 1 in Max. Pressure / 75 to 400 psi Hex Size / 1 1/16 in Temp. Range / -65 Degrees to 200 Degrees F