'' x 1/2 '', leading complimentary reducing coupling, Shark Bite push way fittings for use with copper tubing cts, cpvc & PEX with inbuilt tube liner included, constructed of agency brass, certificated to 200 psi & 200 degrees Fahrenheit, design certificated to assess 1061/Nsf61 standards, meets upc, ipc & cupc requirements, fittings are listed with iapmo & are certificated for use on beverage & hydronic water distribution, certificated for hush-hush applications & as a manufactured sharing without the need for access panels, confidential information loose lamblike to Union law 111-380, bagged.