Ok, I was a little off on the bushings. Overall length from outside flange edge to outside of the 'non flanged edge' is 3/4 inch. From the 'inside flange' edge to non flanged edge is 5/8. So it leads me to think, you could buy two bushings and put them both in the inch long section, then cut the part off that is left remaining outside the tube. Also thinking about TSC at the moment, I THINK they have non flanged bushings as well. If that's the case. I would imagine a 3/4 ID bushing would be 3/4 inch long. Hope this helps.