This is a great set that includes an air pressure regulator and pressure gauge, essential for airbrushes and air tools. Easy to install, just place it in between the hoses. Compact and smart, it doesn't take up much space. I personally use it for painting. The packaging may have scratches and dirt, but the contents are new and unopened. However, due to the 3cm size restriction for Mercari mail envelopes, the clear plastic packaging may be crushed or broken. Please be aware of this. The contents will be packaged to prevent damage, so please rest assured.