Monroe 911544 Reflex Light Truck Shock Absorbers Impact Sensor Technology: Innovative valving provides greater control for handling, while improving ride comfort All Weather Fluid: Contains special modifiers to reduce friction and ensure smooth rod reaction Full Displaced Valving: Better valving range on both the compression and extension cycles of the unit for a smooth comfortable ride Fluon Banded Piston: Enhances responsiveness to changing road conditions This item is not for sale in Catalina Island