This series of filters is designed for seriously polluted general ventilation and the entrance of air control series as pre-filtration or coarse filtration.
It's processed by high-performance synthetic fiber in gradual technology.
Large dust holding capacity and low initial resistance, economical and practical and inlet side and outlet side are different.
By adding glue to strengthen the hardness and ensure its dust holding capacity and structure, anti-extrusion. Be workable many times after washing the dust collected.