hepa air filter Brand Name: KINGLEI Usage: Intermedia efficiency air purifier filtration for absorb smoke and some bacterial Feature: High efficiency (absorb less than 0.5μm particulars incluing PM2.5 in 99.99% efficiency) low resistance Long life Good water-proof performance Frame(OPTOPNAL): Plastic(PP or ABS) aluminium frame water-proof paper frame size: as customization Filter media (optional): glass fiber PTFE washable static media PP melt blown media Seal strip (optional): EPDM( high resilience) EVA ( high resilience) PU (high density) Efficiency: 99.99%