... ",3/4"x1/2",1"x3/4" 3.Material: Forged brass 4. NSF 61, CSA B137.5, CUPC, Model No.: PXC ... ",1"x3/4",1"x1"Detailed Product Description:1) Forged brass fittings for cross-linked polyethylene tubing2) Meets requirements of ASTM ... / F877, CSA B-137.5, and NSF61. CUPC,NSF Approved Brass Fitting PXC COUPING