Primary filter cotton

This series mainly absorbs the larger particles to prevent the early ceiling filter block, it is made from
hardened fiber and is covered with glue for hardening and stabilizing the fiber, the hardness and density are
better than the same kinds of products, the primary filtration efficiency and the air flow rate have been increased.
Application: ≥5μm , Filter dust (especially used in the train or the subway, where the place has air-conditioner),
pre-filter through air filter program
Type: pads or rolls size
Media: synthetic fiber with gradual density,
Washable: about 2-3 times
Hardened primary filter(blue & white)
This series is made of prolonged and hardened fiber, it is sprayed with
special blue glue. The blue glue is able to show the use life directly,
when the blue part being covered with dust totally, the filter must be replaced