The Oil Free Compressor is designed so that the air being compressed never comes into contact with any oil. They use very special components that are coated with pre-lubricating material that keeps them from wearing out due to friction. One of the most popular materials used for such coating is Teflon, which reduces the friction between moving parts without oil. These compressors tend to have a smaller clearance than their oil-injected counterparts, which means there may be less room for them to intake and move enough air to properly circulate and cool. The Oil Free Compressor is very efficient and durable.