ASTM F1960 Grip™ fittings are made from No Lead, dezincification resistant and stress corrosion cracking resistant brass. Preformed copper assemblies and kits complement the full range of fitting options available as PowerPEX Grip. F1960 fittings can only be used with PEX-A tubing. Each fitting provides a large I.D. for better flow characteristics. The expansion sleeve and tubing system provides a can't miss visible connection.