The AirRide Pin Box acts as a buffer between the tow vehicle and RV, arresting the impact of road shock and stabilizing the towing performance. How? Simple - the unique scissor action allows the air bag to absorb road shock and vibration while the gas shock handles the rebound or bounce effect, giving RVers a better, smoother ride. Features: Gas shock and air bag combination absorb road shock and control fore to aft coach movement, otherwise known as chucking. Protects from damage caused by road shock and vibrations potentially saving owners costly repairs. Improved ride. Replaces all popular LCI pin boxes;16K (1621), 18K (1621), 21K long jaw (1621), 21K (1716), 18K (0719) and 21K (1116)
