Speciality:     1）     It's used to pre-filter or coarse filter in the inlet of general ventilation and air controlling system.     2）     G3,G4 are available. It's workable many times after dust collecting or cleaning ,which is economical     3）    Temperature resistance: 100 ℃ -120 ℃         Using:     1）     Applied to the industry using, such as air-condition industry, electronic industry, pharmacy, food factory, etc.     2）     Applied to the pre-filtration of the coarse efficiency filter system and medium efficiency filter system.         Remark:     l          Wide variety of sizes and thickness