Characteristic:  
> The active carbon respirator has an anti-virus and filters germ, deodorization, effects like dust palliative,etc, the energy is useful to block to compress medium benzene, ammonia, formaldehyde, the difference asks, and the foul smell waits harmful gas
Detailed parameter:
> Material:PP material+active carbon cloth+have no dust cloth
> Pack:Is 50/box, 40 boxes of/box