Insert Coupling, Lead Free, .5-In. Brass Barb, 10-Pk.10 pack, 1 2", lead free brass barb insert coupling, for connecting 2 pieces of 1 2" cross link polyethylene pex tubing, secure barb ends of fittings to pex pipe with tv #608 933 cinch clamps & tv #608 743 cinch tool, or copper crimp rings & crimp tool, immediately testable to well over 100 psi, meets the new nsf ansi standard 14 2009 & astm f 1807 9si standard for products intended for the transport of potable water, ansi nsf standard 61 annex g for