Here's a much better (visual) description. Interesting. https://www.youtube.com/watch?v=q3phjAQZdGg https://www.youtube.com/watch?v=q3phjAQZdGg Newer nozzles

Here's a much better (visual) description. Interesting. https://www.youtube.com/watch?v=q3phjAQZdGg https://www.youtube.com/watch?v=q3phjAQZdGg Newer nozzles allow far more dispensing accuracy: https://www.youtube.com/watch?v=mZI_mNlzWTA https://www.youtube.com/watch?v=mZI_mNlzWTA Here's a different design with a more graphical presentation: https://www.youtube.com/watch?v=a1-X7VIxFIo https://www.youtube.com/watch?v=a1-X7VIxFIo Comment: I don't understand whey companies (and people) insist on adding annoying music to their videos.