Constructed of lead free dezincification resistant (DZR) brass for superior reliability and strength. Compatible with PEX pipe. Meets UPC, IPC and cUPC standard. Can be secured in place using copper crimps, stainless steel pinch clamps or stainless steel crimp sleeves. NSF listed. Barb connection for PEX plumbing systems. Rated to 200F and 200 PSI. 5 pack. Size 1/2.