This extension was used when we had an overhanging truck camper and towed our boat behind it on vacations. It fits a 2-1/2" Class V receiver on the truck end, and has a standard 2" square receiver on the trailer end. Rated for 6000#, 8000# with w.d. hitch. This one also has a standard 7 pin trailer connector extension. (There is some non skid tape on the top and reflector tape on the sides.)
They come for 34" but can be cut down for 24" as this was to clear the truck spare tire. The dimple in one of the pictures is not damage, it's made that way so it has a small angle when installed.
For more details please see https://www.reesehitches.com/products/45292
Asking $150, they are $280 at eTrailer, without the connector extension. Please send me a PM if interested. Thanks!