About This PACKAGE INCLUDE: 5 pack 1/2-inch brass crimp polybutylene transition couplings with 10 rings (5 each). They are designed to accommodate PEX A,B,C & PB pipes. SUPERIOR QUALITY: HeSun crimp fittings crafted from high-quality, lead-free brass, resistance to corrosion, rust, and high temperatures (32℉—200℉). GREAT PERFORMANCE: HeSun PEX fittings are Certified to ASTM F1807 and NSF/ANSI 61 standards. Approved for potable water applications. VERSATILE APPLICATION: Ideal for use in hot and cold water supply systems, heating systems, and more, these components find extensive use both indoors and outdoors. BROAD COMPATIBILITY: Compatible with both stainless steel clamp and copper crimp ring & also PB systems for installation. Not suitable for use with Expansion System. Overview Size : 1/2 INCH Material : Brass Brand : HeSun Connector Type : Coupling Thread Size : 1/2 INCH Exterior Finish : Brass Number of Pieces : 5 Manufacturer : HeSun