Added small built-in pressure regulator for better pressure control. The device worked very well, the stainless steel bottle should be quite strong compared to flimsy aluminum models which tend to break the neck when dropped. My only criticism is that I was expecting it to mix the solvent and air in the bottle, but the device just ejects a steady stream of solvent. As it is, I'll spend a liter in a hurry. Entraining a small amount of air into the fan element improves cleaning efficiency and increases cleaning time for a given amount of solvent. I'm thinking of drilling a tiny hole in the roof of the hyperbaric chamber to do just that. However quite happy with one use. From China.