3 Pack, 1" Lead Free Brass Barb Insert x 1" Male Iron Pipe Thread Adapter, For Connecting 1" Cross Link Polyethylene Pex Tubing To 1" Female Iron Pipe Thread Pipe End Or Fitting, Secure Barb Ends Of Fittings To Pex Pipe With TV #597-556 Cinch Clamps & TV #608-743 Cinch Tool, Or TV #597-325 Copper Crimp Rings & TV #597-693 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 Lead Free Compliance & The Wetted Surface Of This Product Contacted By Consumable Water Contains Less Than 0.25% Of Lead By Weight To Meet AB1953 California & VT S152 Vermont Low Lead Restrictions.