1. Made of high quality materials for durability 2. Filter dust to prevent dust, pollen and other allergens from infiltrating your breathing air 3. The filter can intercept fine dust with a diameter of 0.3 micrometers or more, effectively filter pet hair, dust, dander and other pollutants, promote fresh exhaust, no secondary pollution 4. It is best to replace the spare parts every 2 to 3 months to keep the machine running at peak performance Color: white + red Material: plastic + filter paper Package Contents: 10 x filter Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.