It is a stand for air brush. Compared with the conventional type, because the hanger position is set high, even with the trigger type or hand clip type air filter attached, you can easily put it on the hanger. With a magnet, it can be set in a convenient position for the tray. 
PS275 ProCon BOY WA Trigger 0.3mm is not supported. 
You can also put a spray. 
Since the stand position is high, it can be placed even when the hand grip type air filter is attached. 
LWA trigger type can also be placed. (Parts for installing the trigger type.)