Since it is a successor to the one that was attached last time, it can be installed in the summer and the operation is perfect. (Translated by machine.)
It acts as a filter firmly for a small filter regulator. Moisture in the air accumulated in the plastic below and could be removed by pushing it by hand. (Translated by machine.)
Air leaks occurred due to aging of parts that had been used for about 10 years. I was hesitant to replace it because I thought it was an expensive part, but when I searched for it with Monotaro, I was able to purchase it cheaply. After replacement, air leakage has been improved and it can be used without problems. (Translated by machine.)