Directly from One of the Biggest Pex Systems Manufacturers 

10 PCS 1/2" x1/2" Straight Coupling Poly PPSU Barb Crimp Pex Fittings, Lead Free with PositionTab

Suits with all types and brands of Pex Tubing: Watts; Everhot; Viega; Nibco; Sharkbite; Bow; etc. 

Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems 

ASTM F2159 NSF/ANSI 61 NSF 372 Certified