... & light weight 3>Certificate:ISO9001:2008 4>OEM & ODM accep HEPA Cartridge Air Filter for Air Cleaner Production Description:1) Frames ... :1)Air HFPA purifier, air cleaner, vacuum cleaner,etc.2)FFU, electronics, semiconductor, hospital and food industry2)Medical nano silver masks ... as 0.3 microns.The materials we used to produce HEPA can be classified in five types: PP filter paper, glass ...