... /4",1",1/2"x3/8",3/4"x1/2",1"x3/4" 3.Material: Forged brass 4. NSF 61, CSA B137 ... .: PXC Product Name: PXC COUPINGSize: 3/8",1/2",3/4",1/2"x3/8",3/4"x1/2",1"x3/4 ... ",1"x1"Detailed Product Description:1) Forged brass fittings for cross ... / F877, CSA B-137.5, and NSF61. CUPC,NSF Approved Brass Fitting PXC COUPING