* A lot of dirt dust and debris are lifted off your surfaces when using a vacuum cleaner and the last you would expect is the debris to be exhausted back into the airstream. This replacement Post Filter plays a vital part in the life of a vacuum cleaner. Its purpose is to collect the dust that passes through the suction nozzle from the carpet or floor helping prevent it from being spread around the room. If you find that dust is escaping your cleaner then the filter may be clogged. If this happens the vacuum cleaners motor can become overheated as dust particles are not filtered out and make their way into the motor. Please check model fit list to ensure this part is correct for your model.