* Pre-filtration for the heavy polluted general draft apparatus and the air control system.

* Anti-fractured PET organic synthetic fibre

* Large dust holding capacity , small resistance , long service life and economical

* Not contain silicon , chemical resisting and anti-acidic

* Conform to European and American classfications for nonflammability( e. G DIN53438-F1 , UL900-class 2 with flameout)

* Applied to pank filter and foldaway filter

* Available in paper frame , galvanize frame , aluminium frame and so on