The Astro Pneumatic 2618 Heavy Duty Air Control Unit - 120cfm Capacity is designed to filter water, oil and particles down to 10 microns. The filter element is reusable. It includes one filtered main line and two regulated lines. Range of use includes Industrial, mechanical, automotive, marine and aviation markets. Specifications: Air Inlet: ½ “NPT, Air Out: ¼”npt and 3/8”npt filter, Filtration Degree: 5μm, Regulator Capacity: 50 CFM, Filter Capacity: 120 CFM. Note to customers: It may be required to tighten the four bolts at the top of the unit before using to prevent leaking.