Pen Press Spacers

If you own a press like this one for assembling turned pens:

https://www.amazon.com/T-king-Turners-Assembly-Joining-Projects/dp/B083FDVPWX

you may find, as I did, that the spacers provided don't provide all the flexibility you need to assemble pens or other gadgets of different sizes. These spacers are 10mm, 15mm, and 20mm thick and give you a lot more leeway in setting up the press for different sized pens.

I made them out of PETG because it looks and feels most like the material the originals are made of, and they're more durable than PLA, but probably PLA or ABS would work as well.