1. and high quality. 2. Made of high-quality materials, durable and practical. 3. The filter can maintain the clean performance of the air purifier, while reducing the penetration of dust, pollen and other allergens into the air you breathe. 4. Simple installation, it can be easily removed and replaced. 5. It is recommended to replace it every 2-3 months or according to your usage to keep the machine at its best performance. Compatible with for Air Purifier 4-Fan Models (HE401, HE400, HE402, HE405). Compared to Part HE4FKPETP filter Colour:As Shown Material:composite material Package Contents: 1 * hepa 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.