Spectra Dust Collector filter pad is  progressive density fiber glass  allows the pollutant to penetrate deep into the media, along with the harmless tackifier over the fibers arrest the pollutant and make it stick together. The filter pads can be constructed  with suitable frames depend on the use of the application. 

Ruggedly constructed, heavy duty, high efficiency filter. A special dual layer, graded density media ensures extremely high dust holding capacity & therefore lower operating pressure loss.

Spectrum Microvee filters are rigidity constructed filters for coarse and fine particle capturing can be used as both primary and secondary stage filters depends on the class it is rated. The unique filter media is designed with layers of synthetic mesh that has  non-woven sandwiched in between. The pleats are V shaped and rounded well to increase the dust arrestance of filters. Media is further enforced by metal expanded mesh to give extra rigidity to pleats so that peats would retain their shape at higher pressure drop. Equal spacing in pleats is maintained by use of metallic spacers.

An excellent panel type Pre-Filter for Turbomachine intake. The electro galvanized frame is sturdy and corrosion resistant and is of exceptionally high strength. The polyester felt media is pleated with a high carbon steel wire mesh backing. The media is washable to ensure that the panel filter can be repeatedly cleaned. It is an excellent choice as a pre filter for multistage intake air filter house in turbo machinery.