Features
===Material===
It adopts organic fiber filter materials with high strength and stable quality. It can resist water vapor, oil mist and erosion. It can be recyclable and do secondary use.

===Frame===
The frame is injected with SBS plastic with high strength, good elasticity and air impact resistance. It is very suitable for ventilation environment of frequent changes in wind speed and pressure.

===Advantage===
There are some glues filling between the frame and the filter material with air proof, firm bonding and good filtration efficiency.