Zurn® ZURN PEX® Crimp Ring, Retrofit, Fitting/Connector Type: Crimp Ring, 1/2 in Nominal Size, PEX, 0.33 in Thickness, 80 psi, Copper, Black, 33 to 200 deg F, 3/4 in OD
For use with SDR9 piping It's designed for longevity and durability ASTM F877 specification for crosslinked polyethylene (PEX) plastic hot and cold-water distribution systems ASTM F1807 specification for metal insert fittings utilizing a copper crimp ring for SDR9 cross-linked polyethylene (PEX) tubing