Compression Brass Fitting Connector Coupling X Male NPT&nbsp; 1/2 Comp x 1/2 Male "Three piece construction - nut, sleeve and body with attached insert Easy to disassemble no flaring tool required " Use with copper, brass, aluminum, or plastic tubing Standard fittings use short nuts 1/2" compression 1/2 Male side Primary uses non-drinking water, gasoline, oil and vacuum lines Primary uses non-drinking water, gasoline, oil and vacuum lines application Not intended for HUMAN consumption 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.