Supply Giant PEX Barb Elbow (10-Pack) is an easy to install, low cost solution to connect PEX Pipe. Supply Giant PEX Barb fittings are compatible for potable water distribution and hydronic heating applications. These PEX fittings may be used with the stainless steel clamp system or the copper crimp ring system (both sold separately). Supply Giant PEX Barb fitting range offers a wide variety of Fittings, Manifolds, Valves, clamp rings, crimp rings and tools in various sizes to help complete your next plumbing project. ⚠ California Proposition 65 Warning: This product is known to the state of California to cause cancer, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.