Standard 608ZZ bearings.
Nominal dimensions:
8mm inside
22mm outside
7mm thickness
Please note I am not a bearing expert, these are from China, they look and feel good to me but f they don't meet with your personal approval though I'm happy to accept returns, of course.
Here's a fun fact for you, multi function printers are virtually thrown away by people (just look at all the ones that sell for a dollar here) when they upgrade, but if you take 30 minutes to pull them apart you will find a multitude of nice stainless steel shafts in them (and motors, gears, wheels, various electronics, even a pump for the ink which you could repurpose...). The scanners on such printers often run on 6mm shafts, and there are a usually 8mm and/or 10mm shafts in the printer's paper feed path.
So get yourself an old printer, rip it to bits (violently if you like, Office Space style) and pull out those shafts to use in your next crazy project - you'll probably want some of these bearings!
See my other bearings and sleeves:
283.mytrademe.info
