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NO. :
Name: Framed primary-efficient filter

It mainly filters the particles with diameter of over 5 microns, the frame is made of hard anti-flame paper boards or aluminum and it was combined with synthetic glass fiber or glass fiber,the filter can be flat or folded,the cost is much lower,it is changed easily.
The filtration grade is G2,G3,G4,it's used widely for primary filtration and its sizes as below:

610*610*46mm

592*592*46mm

592*287*46mm

203*203*46mm