1.Apply automatic production ake make mini pleated cartridge.
Black carboard framework,foam wrapped on the back edge to provide postive seal.
Electrostactic high quality material to promise high efficiency.
2.HEPA Pad materials are available in six types:PP filter paper,glass fiber,compound PP+PET filter paper,meltblown+polyester non-woven,meltblown+glass fiber,PTFE(Washable).
3. custom per your size