Kyle_A, Heres the picture of the parts I used to make my rollers. UHMW bearing, metal mounting brackets and 5/8" shaft. The plastic pipe I used was schedual 80 electrical conduit and metal tubing to fit inside of the schedual 80 pipe. I run a 17' Willie drift boat on it and seems to work excellent.

Then I had them welded together to make a very nice roller system on the trailer. fp