My Equal-i-zer brand is a 1,000 lbs version as evidenced by the label on the bars which read 90-00-1000 and 1,000 max tongue weight and 10,000 max trailer weight.
The hitch has "C1" molded on the head near one of the bar pivot bolt heads.
I bought this new with my current trailer 3 years ago so the labels are still legible. I don't have another to compare with. Maybe a local dealer has a couple that would give you a clue. My bars are 1-3/8" square if that helps.
Their parts manual does not give physical dimensions but perhaps the bar sizes are measurably different.
Maybe Equal-i-zer would give you some specs. That would be handy if buying used and the labels are gone.
