Designed from Prof. Zsolt Kovacs and the University of Brescia (italy), this Air Valve Spring is the most effective add-on for every Iwata airbrushes.
Made of austenitic stainless steel, Zsolt’s spring needs about 75grams to open the air flux (@0 air pressure), the original CM-B spring needs 160grams, while the HP-B needs 320grams. The air is perfectly closed up to 4bars . The finger fatigue won’t be a problem anymore. Giving more softness to the trigger will result in more feeling with the airbrush and less ergonomics problems.