The premium pre-cut HRF-A300 Pre Filters A is designed exclusively compatible with for HEPA Air Purifier HPA300 Series: HA/HPA300 series, HPA304 series, HPA3300 series, HPA5300 series and HPA8350 series models. Replacement for HRF-A300 Pre Filter A. Our HPA300 air purifier pre filter replacement for is made of high quality activated carbon fiber by the manufacturer, with lower wind resistance, higher efficiency and less pressure to maximum filtration and keep your air purifier at its best working condition and capacity. Enjoy fresh air all-year-round with Air Purifier Pre-Filter A Replacement for to ease uncomfortable symptoms caused by problematic air. The activated carbon in this pre-filter helps capture larger airborne particles such as lint, fibers, pet fur, and reduce common household odors and wildfire gases, maximizing the HEPA filter life. Package includes 8 x Pre-Filter. We recommend you to replace every 3 months for best performance. Using Replacement Filters guarantees the best performance for your air purifier and improve your air quality and neutralize odors for a cleaner breathing experience year round. Easy Installation: Replacing the filter is as easy as it gets. The product seamlessly fits into your air purifier without the need for any extra tools. Colour:Black Material:activated carbon fiber Package Contents: 8 * Pre Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.