General description 100% new and high quality HEPA filter replacement designed to effectively filter fine dust, reducing dust, pollen, and other allergens from the air you breathe. This filter is made of high-quality materials for optimal performance. Technical specifications Material: Plastic Package Contents: 10 HEPA filters Measurement allowed error: +/- 1-3 cm Installation Easy to remove and replace as part of normal maintenance. Usage It is recommended to replace the filters every 2 to 3 months to maintain the machine's best performance.