copper push fit, 1/2″ copper x 1/2″ copper, coupling with stop, fittings provide a clean & easy joining method that’s designed to save time & money on installations, installing a joint is simple, requires no extra materials for copper & cpvc tubing installations & a tube liner for pex installations, no more solder, flux, heat or special pressing tools needed, results in lower costs, reduced labor time & a clean & efficient installation process.