CURT class 1 hitches are ideal for adding cargo space to your car or for towing a small, lightweight trailer. The 1-1/4" x 1-1/4" receiver tube can accept the shank of a cargo carrier, bike rack or a ball mount. This trailer hitch kit comes with a ball mount included. It has a 3/4" diameter hole to accept a trailer ball, and the ball mount can be flipped to provide extra drop or rise for level towing (trailer ball sold separately). No matter what you are towing, Curt wants you to be able to Bring It® for years to come, and that is why all CURT trailer hitches are put through rigorous testing before being deemed ready to tow. Curt tests each hitch to SAE J684 to ensure safety for you and your family. This particular class 1 hitch is rated for up to 2,000 pounds gross trailer weight and 200 pounds tongue weight (Note: Never exceed the lowest-rated towing component). Exposure to the elements is inevitable for any trailer hitch. As such, Curt goes to great lengths to ensure that our hitches are well-protected for the road ahead. All CURT trailer hitches undergo their industry-leading co-cured finishing process. First, the hitches are mechanically and chemically descaled. This creates a smooth surface for the rest of the finishing process. Then, they are dipped in a liquid Bonderite® solution, completely immersing the hitch and covering it inside and out with a rust-resistant coating. Next, a black powder coat finish is applied over the top of the Bonderite®. Finally, the two coatings are co-cured together, forming a final finish that offers superior rust, chip and UV protection. All CURT custom class 1 receiver hitches are designed, manufactured, finished and tested in the USA (may include imported hardware). This gives direct control over the quality of the hitch and ensures dependability for you on each and every adventure. This trailer hitch for Audi A4 Quattro comes with a class 1 ball mount, hitch pin and all necessary hardware for the installation (Note: A trailer ball is not included with this package and must be purchased separately if needed).