3/4" x 1/2", Lead Free Brass Barb Insert Coupling, For Connecting 3/4" & 1/2" Pieces Of Cross Link Polyethylene Pex Tubing, Secure 3/4" Barb End Of Fitting To 3/4" Pex Pipe With TV #608-826 Cinch Clamps & TV #608-743 Cinch Tool & 1/2" Barb End Of Fitting To 1/2" 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 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.