Hypertherm air filtration kits come with a 1-micron filter to protect Hypertherm Powermax® plasma cutting systems against contaminated air and an auto-drain moisture separator that filters water and moisture from air lines. It is compatible with the Powermax30® XP,45,65,85,105 and 125. Filter attaches to the power supply through existing mounting holes and an indicator in the filter housing that turns red when airflow is reduced offering a visible prompting to change the internal filter element.