1", Brass, Lead Free, Pex Barb Insert Coupling, For Connecting 2 Pieces Of 1" Cross Link Polyethylene Pex Tubing, Immediately Testable To Well Over 100 PSI, To Secure Barb Ends Of Fittings To Pex Pipe May Use With TV #597-556 Cinch Clamps & TV #608-743 Cinch Tool, Or TV #597-325 Copper Crimp Rings & TV #597-693 Crimp Tool, Not Included, Meets 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.