This is a three part protection unit for tools and machinery using compressed air to operate them. The unit consists of a regulator, air filter and lubricator with 1/4″ NPT air inlet. The regulator can control air pressure from 0-120 PSI with a maximum of 140 PSI. The air filter helps control moisture and rust in your tools and the lubricator adds oil to your tools for proper tool operation. Maximum air flow is 60 CFM.