tompoland You are spot on, I have made a mistake, I meant 800 nm, which is 0.8 microns, which is 0.0008 mm. Espresso is weird indeed😀 and yet great fun.
BTW I have come across some announcement by 1Zpresso with regard to some litigation by a German company (Commando?) for infringing some IP. As a result for a while 1Zpresso have stopped selling at Amazon, but this has been resolved quickly.
In a way this is re-assuring that 1Zpresso have done something right and they claim that their own IP is solid.
Anyway, I am not sure such incremental changes (from 8.8 down to 8.0 microns) make big bucks given that each new product is calling for a new campaign, i.e. expenses, and they do not sell it long enough to make a tangible profit. But this is beyond the point.