For use in securing brass or poly alloy barbed insert PEX fittings with PEX tubing. CinchClamps come in sizes from 3/8" to 1" and use the same CinchClamp tool (SKU 451683). Made from 304 stainless steel and compress faster than the copper crimp ring method. Can be used with most manufacturers' PEX pipe. Meets ASTM F2098. Poly bagged. Watts WaterPex CinchClamp should not be used with wrot copper fittings. When using CinchClamp clamps, when the ambient air temperature is below 30 deg. F., extra care must be taken while making the connection. Keep the CinchClamp in a warm place if possible, and make the cinch in a slow, even pace. Failure to do so may cause the CinchClamp to not seal properly.