These are 100% Oil Free, wherein not even a single drop of oil is used. These are a boon for Vacuum & Pressure Applications, where even slightest Environmental Contamination through oil mist is forbidden. Chemical Analysers, Pollution Control Equipments, Gas Monitoring, Nitrogen Generating Sets, Ozone Generators, Operating Clinical, Medical & Scientific Laboratory Equipments, Suction of Desoldering Waste, Filtration, Dentistries & Spray Painting.