Pneumothorax filters with the specified diameter. They prevent engine fumes from entering the throttle. Vapors getting to the throttle dirty it, which results in a decrease in power. Thanks to the filters, the pneumothorax is released directly into the atmosphere. Simota offers various diameters of pneumothorax filters suitable for rubber tubes. Vacuum filters with the diameter specified in the title. They prevent engine fumes from entering the throttle. Simota offers various diameters of odmy filters to fit rubber tubes.