Threaded Stem Shim 1" - 1 1/8"
This shim fits inside your steertube and allows you to use a 1" threaded stem on a bike with a 1 1/8" threaded fork. Real handy for fixing up that old Kona, since 1 1/8" threaded stems are getting very hard to find, especially in shorter lengths.
The inner diameter is 22.2mm and the outer diameter is 25.4mm. There is a lip at the top to prevent it from sliding down inside your fork during installation. Overall length is 8cm, so it gives you lots of adjustability. These work really well: if you look at the final picture, you will see it adds surface clamping area to the inside of the fork.