Features:

• Features E-coated black powder finish
• Adapter for 1-1/4" receiver that converts to 2" receiver and extends to 6"
• Have 3500 pounds gross trailer weight rating
• The adapters do not exceed the weight limits of the hitch
• Have to be used with class II hitches only

Editor Reviews:

Product Description:
Hidden Hitch Painted Receiver Adapters helps in adapting the receiver to fit specific needs. These receiver adapters are for 1-1/4" receiver that converts to 2" receiver and extend to 6". These receiver adapters have 3500 pounds gross trailer weight rating. The receiver adaptor features an elegant E-coated black powder finish. These painted receiver adapters can be used with class II hitches only. They are made from highest quality steel.

Rating : - Better part description would help.
I found the item description to be ambiguous. The picture is no help because it shows three part numbers and does not say which one is which.
The 80303 goes from 1-1/4" ON YOUR CAR and sizes up to 2" at the back end where the carrier or rack would insert. It is the part shown in the middle of the picture.