Product Name: HEPA air purifier in addition to pm2.5 dust net electrostatic electret cotton Electrostatic electret filter using 3D acupuncture process, less wind resistance, cleanability. Effectively extend the filter life of three to five times. all types of air purifier HEPA filter Suitable for: xiaomi air purifier 2 / 1 / Other brands of air purifier, air conditioning dust, central air conditioning inlet, windows, dust, anti-fog, etc. color: White Material: Cotton Size: 68x30cm Package Contents: 30pcs * electrostatic cotton 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 +/- 1-3cm.