SharkBite Brass Male Adapter SharkBite PEX Barb threaded male adapter 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 you to connect with either a stainless steel clamp system, or a copper crimp ring system each sold separately and is FNPT threaded on the other side. The SharkBite PEX Barb fittings are compatible for potable water distribution and hydronic heating applications. Approvals ASTM F1807, NSF/ANSI 61, NSF 372. Size 3/4 In. CF x 3/4 In. MPT, Material Brass, Pkg Qty 10, 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.