Total Control - One of our 5 Ways to Spray. Offering total control for fine detail to medium spraying, Iwata’s Hi-Line and High Performance Plus Series airbrushes are designed around the legendary Iwata HP Series which established the Iwata name in the creative community over 50 years ago. Hi-Line Series airbrushes feature a Micro Air Control (MAC) Valve that enables incremental control of the airflow. Using the MAC Valve, you can easily restrict the airflow to create stipple effects.