FinishLine Air Control Unit The Value Leader . The FinishLine Air Control Unit ensures clean, dry air is present from the air source to provide ideal painting conditions. The HAR-602 features a 5 micron particle filter and easy mounting bracket to easily install in the shop. Regulates air pressure to provide a consistent rating during use. Removes moisture and dirt from air source to provide ideal painting conditions. FinishLine Air Control Unit - HAR-602 HAR602