This 3/4 inch crimp x 3/4 inch crimp poly alloy PEX coupling is manufactured in accordance with ASTM F-1807. It is compliant with CSA standard B -137.5. It is used for making WaterPEX repairs in the field, continuing a run as well as transitioning from polybutylene pipe to WaterPEX tubing. It comes in a resealable poly bag of 10.