... materials are available in six types: PP filter paper, glass fiber, compound PP+PET filter paper, meltblown+polyester non-woven, meltblown+ ... the element5.Normal distance between two glue beads of the element is 50.8mm(adjustable according to requirement Product Property:Removal ... not released into the air again.Air filter Application:1). Air HFPA purifier, air filter bags etc.2). Medical nano silver ...