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.