Filtration function: The filter can maintain good air circulation without affecting the suction performance of the original filter. They can efficiently filter dust impurities and provide you with fresh indoor air. Protect the filter: As a practical filter, coarse dust will not clog your original filter, allowing the filter to always maintain high performance and greatly extend its service life. Easy to use: You can use it as a pre-filter, just fix the filter around the original filter to filter out dust before it enters, effectively extending the service life of your machine. You only need to replace this spare filter regularly to avoid premature clogging of the original filter, allowing it to work better and save money. Widely available: approx. 68 x 30 cm. You can also cut it as needed to fit your machine. It can be widely used in filters of various types of purifiers, vacuum cleaners, air conditioners and automobiles., Weight: 0.440924524 Pounds, Manufacturer: YanBan