Interstate Pneumatics 1/4" Mini Poly Bowl Filter/Regulator/Lubricator Integral Combo. 1/4 Inch Mini Poly Bowl Filter/Regulator/Lubricator Integral Combo Efficiently traps moisture while passing through clean, dry compressed air that is lubricated with a mist of air tool oil to keep your tools well lubricated which reduces wear & tear & extends the tool life. For preventing your air tools from rusty air & foggy atmosphere & keep those in working condition for a long time we suggest use of air preparation devices such as filters, regulators, and lubricators. Clean air is a key ingredient that enables effective and efficient use of tools, equipment, and machinery in almost every industry.