The PEX Barb Coupling (10-Pack) is an easy to install, low cost solution to connect PEX Pipe. 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). These 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. Color: Brass.