Product Description 30~35% efficiency coarse filter media: Synthetic materials of different densities compounded in 3D structure through needle punch, adhesion, meltblown technology. Specifications could be customized for different demands of our customers. Features: 1. Low resistance 2. Large dust holding capacity 3. Synthetic material of different specifications 4. Material density increases gradually 5. Non-toxic and odorless 6. Fire-resistant. 7. Dimension can be customized Parameters: Application: Used as pre-filters to capture particles in air conditioners, paint booths and panel filters. Our advantages: 1. Own factory and competitive price 2. Automatic production line. 3. Integration of manufacturing and trading 4. 9 years of professional experience 5. ODM, OEM acceptable 6. Good after-sales service Pictures: