Auto Air Filter 4

Single-effected/double-effected auto air filter:
Single-effected (white color): particle filtration
Double-effected (mixed color of black & white): Particle Filtration & Polluted air filtration 
Static nonwoven filter core (single-effected) / Activated carbon nonwoven compounded filter core(double-effected)
 Enhanced polypropylene plastic frame
Filter core and plastic frame are fixed by plastic injection molding directly with compact configuration.
Single-effected filter can eliminate the inhalable particulate matter from outside such as the pollen/particle/microbe, etc effectively to purify the air inside the automobile.
Double-effected filter can eliminate the inhalable particulate matter from outside such as the pollen/particle/microbe, etc, but also can get rid of the smog smell /toluene/sulfur dioxide such harmful gas effectively to purify the air inside the automobile