The Air Shocker provides the ultimate smooth ride. The Air Shocker is a miniature air suspension unit mounted between your truck and trailer. This Shocker mounts by sliding into a two-inch receiver tube. The air bag sits under the receiver tube allowing a short distance of 10-inches between mounting pin and ball center. You will find the advantage of the Air Shocker is your ability to adjust air pressure for best ride and load control. Another benefit of Air Shocker is it can be used as a tongue scale, 5lbs air pressure per 100lbs tongue weight.