SharkBite 1/2" Barb x 1/2" FIP PEX Brass Adapter, 10-Pack is a lead- DZR brass fitting designed for easy installation and cost-effective connections to PEX tubing. It is primarily used with PEX-B tubing but is also compatible with PEX-A. This versatile adapter allows you to connect using either a stainless steel clamp system or a copper crimp ring system, both sold separately, and features FNPT threading on the opposite end. I for potable water distribution and hydronic heating applications, it meets important standards including ASTM F1807, NSF/ANSI 61, and NSF 372. Model Number: