Lippert Components 155943 M19 Air Ride Pin Box, 21K, Replaces LCI 1116 Pin Box:Air bag acts as a buffer between the tow vehicle and coach to absorb road shock and vibrationImproves ride and reduces driver fatigueCan be retrofitted to most pin boxes on the marketReplaces all popular LCI pin boxes: 16K (1621), 18K (1621), 21K long jaw (1621), 21K (1716), 18K (0719), 21K (1116) This product ships in approximately 1 days