Monroe 911058 Reflex Truck Shock Absorber Designed with the patented impact sensor technology and combines specially tuned valving with a fluon banded piston Consists of a nitrogen gas charged that maintains tire to road contact by reducing aeration Features an impact sensor valve that provides greater control for handling, safety and overall ride characteristics of the vehicle Includes special modifiers, nitrogen gas charged and full displaced valving tube to reduce friction This item is not for sale in Catalina Island