This is one of several trailer hitch ball mounts that we found after my uncle passed away earlier this year.
Specs: It is marked as 2" and 6000lb. There is no pin included. Appears to be for a U-Haul type truck, so the connector (not the ball part) is larger than the other two I posted.
I cannot speak to the quality of this ball mount as I have never used one and I'm doubting my uncle used it either. He just bought things that looked like a good deal...