Haven’t used yet quality looks great
Well the 120 micron will produce a higher yield yet the 90 micron will produce a more refined rosin. You still need to consider temperature and time of press. That being said, I was very pleased with the 20 pack and thought it was great value. The bags do their job and are of a high quality. I had some issues with calculating shipping on the web page so I sent an email to Will who was really helpful in solving the problem. He provided a quick solution and I received my delivery less than a week later. Many thanks.