Feature:
Frame: galvanize plate, stainless steel or extrude Aluminium ,
Filter material:  high-density and fire-retardant glass-fiber
Sealant: Polyurethane
Media : Hot cement
Sealing element: neoprene

Around the frame wall, it is sealed with polyurethane glue to aovid the leakage.
The intake surface and air outlet surface are both with power-coated carbon steel net to avoid the damage of the filtration paper and to inhance the whole tensity of the filter.
This  filter without clapboard is feature with  high efficiency,low resistance,  light weight , and uniform airflow. easy to install, and large clogging capacity  and Stable construction
Effciency: over  99.9995% efficiency at 0.1~0.2μm speck.