SharkBite 23104CP25 Crimp Ring, 1-Inch, Pack of 25, 25 Pack CRIMP RINGS: Time and cost savings with the use of SharkBite PEX Crimping Tool - 23383 FAST: No waiting for glue to dry or joints to cool ASSURANCE: Copper crimp rings and heavy duty PEX Crimping tool do not require calibration and allows each joint to be checked with a go / no-go gauge. USE: Use with SharkBite PEX pipe tubing, PEX Crimp Tool and Barb Fittings RESIDENTIAL and COMMERCIAL: All SharkBite products meet the same standards for commercial and residential plumbing applications