Specifications: HEPA air filter cartridge 1)Odorless non-toxic ,eco- friendly. 2)ISO/SGS/RoHS compliant 3)High efficiency, low resistance HEPA air filter cartridge Production description: HEPA filters are 99.97% effective at removing particles as small as 0.3 microns .made by filter cartridges, active carbon, photocatalyst, cold catalyst, nano silver.Hepa filter has the functions to purify and absorb the stink substances in the air such as ammonia, fluorine,formaldehyde, methanthiol, hydrogen sulfide etc, but also has the superstrong power to kill stubborn bacteria and fungus. Product Property: 1).Broad-spectrum function: absorb and kill the bacteria 2).Long residual action: No effect change for the fabric with “nano silver” being washed 100 times 3). Safety: non-toxic, harmless, no sensitive reaction. Application: 1). Water purification, air purifier, air filter bags etc. 2). Medical nano silver masks, exposure suits, hygiene necessities. 3). R & D center to develop and produce according to client request. We are ISO factory for manufacturing filter materials and non-woven fabric since 2004. Welcome to send us the inquiry or visit our factory in Shenzhen, we will do our best to serve you with our favorable price, good quality and prompt delivery. Factory Certificate HEPA air filter cartridge