Directly from One of the Biggest Pex Systems Manufacturers 4 PCS Pex 3/4"x1/2" Female NPT Drop-ear Elbow Certified Fitting Lead Free Brass This Efield Product Suits with all types and brands of Pex B or C Tubing Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems ASTM F1807 NSF/ANSI 61 NSF 372 Certified. Directly from One of the Biggest Pex Systems Manufacturers. 4 PCS Pex 3/4"x1/2" Female NPT Drop-ear El Certified Fitting Lead Free Brass. Suits with all types and brands of Pex B or C Tubing. Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems. ASTM F1807 NSF/ANSI 61 NSF 372