What size upper track bar joint is this made to fit?

I already have the RE Extreme Duty track bar and brace, but I'm getting ready to do a HP44 swap and OTK steering so I'm going to need a different track bar. I have a feeling I'd be able to sell the RE a lot easier as a whole, get your track bar bracket and brace, and make my own track bar.

The mounting width is 1.6" at the track bar bracket. We have a greasable poly track bar bushing designed to work with this. The bushings have been tested on our Jeep JK and XJ track bars. They hold up to years of abuse and are designed to work with 1.25" OD tube.

Part Number:
PPM-4306 It will list for $18 each.

We are shooting some pictures of the bushing assembly today, they will be available soon.