Monroe 801809 Monro-Matic Plus Strut All Weather Fluid: Contains special modifiers to reduce friction and ensure smooth rod reaction Hardened and Chrome Plated Piston Rod: Long service life Nitrogen Gas Charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration Unique Rod Guide and Seal: Bronze reinforced rod guide bearing and special seal provides longer service life and consistent performance This item is not for sale in Catalina Island