SharkBite Brass Barb Coupling The SharkBite PEX Barb Coupling is made of a lead-free DZR brass, and is an easy to install, low-cost solution to connect to PEX tubing. 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 as well each sold separately . Approvals ASTM F1807, NSF/ANSI 61, NSF 372. Type Lead-Free Insert, Size 1/2 In. Barb x 1/2 In. Barb, Material Brass, Pkg Qty 100, Package Type Bag Warning This product can expose you to chemicals including Lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.