MEDIUM SKATEBOARD BUSHING
That's what these nylon bushings were made for, but they're suitable for anything that could use a little bushing. Small one is 15/16" dia x 7/16" thick with a 3/8" bore and a slight taper and very light striations on the wider face. The middle-sized measures 15/16" dia x 15/32" thick with a 3/8" bore and a slight taper. The largest is 1" dia x 17/32" thick with a 3/8" bore.
Bearings In Sleeves And Boots