The SharkBite® PEX Barb Reducing Coupling is made of a lead-free DZR brass, and is an easy to install, low-cost solution to connect to PEX tubing. These fittings allow for you to reduce pipe size with one fitting. The SharkBite® PEX Barb fittings are compatible for potable water distribution and hydronic heating applications. These fittings can be used in both a stainless steel clamp system, or a copper crimp ring system (each sold separately).