How do you determine jet size? I'm old and stare at them an can hardly tell one size from another. If there is an easy way please let me know and yes I did search.

 

Never mind I found the stamping but I am going to need a magnifying glass.

 

Well you can also try pin bore gauges haha but I hate to say it, the print is small on them as well. Hobby drills, but that's the same and you might run into accuracy issues. I wouldn't trust a caliper to measure the diameter either.

Maybe once you see the sizes put them each in a small zip lock bag and write the size down in case you need to switch down the road...just an idea.

nick