The Shocker Air Bag Receiver Hitch base frame only. Includes everything except the ball mount attachment. Ball mount attachments available & sold separately. 12,000 lbs tow rating capacity and 1,200 lbs tongue weight. Shocker air provides the ultimate smooth ride. The Shocker Air is a miniature air suspension unit mounted between your truck and trailer. This Shocker mounts by sliding into a standard 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. Fits standard 2″ receiver tube, 2 1/2″ and 3″ receivers. The Original Shocker Air is rated at 12,000 lbs Tow capacity and 1,200 lbs tongue weight.