Usage Tips:HPA300 FILTER R COMPATIBLE AIR PURIFIER MODELS: HPA300 HEPA filter for HPA300, HPA200, HPA250, HPA100, HPA090, HPA3100-HPA3300, HPA5100-HPA5300 and HPA8350 air purifiers compatible. Replacement filter parts #HRF-R3, HRF-R2, HRF-R1 HPA300 True HEPA Filter R Performance: HEPA Filter R can capture up to 99.97% of particles as small as 0.1 Micrometre in the air passing through the filter, helping to remove pet dander, dust, smoke and other particles VALUE REPLACEMENT FILTER SET: It is highly recommended that you replace your air purifier R filter once a year for optimal performance. Multi-Level Cleaning: includes HEPA to help improve indoor air quality. High-quality activated carbon extends the life of your main HEPA filter. size: 25.91 x 16.51 x 4.06 cm Material: cloth colour: White Package Contents: 6 x 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.