Coast Airbrush shows how to replace and adjust the needle packing in your Iwata airbrushes using examples like the Eclipse HP-CS and the Custom Micron CM-C Plus! The needle packing is a small internal part that hugs the needle to create a perfect seal, which allows for optimum performance and prevents paint material from getting to the back of the airbrush. While this is not something you will have to do initially or regularly, over time and with heavy use, sometimes the needle packing can start