MicroAir Ultra-Low Air Pressure Regulators & Controllers for plastic tubing/profile extrusion MicroAir units provide air regulation for the precise sizing of plastic profiles during the tubing extrusion process. Positive Internal air support can be precisely controlled. The MicroAir controls the diameter to maintain your critical dimensions for medical, catheter, or automotive tubing. Ranges as low as 0-2” of water (0.072 psi) and our maximum range available 0-5 psi. Models include: MicroAir I (Manual) MicroAir II (Push Button or Contact Controlled) MicroAir IV (Dual State, Linear Mode, 0-10 Volt Input and Manual) Learn More...