... retention, fan air filters, and flame resistant filters.Aluminum Grid PU Foam Air Filters offer high dust arrestance and ... , cleanable filters are most appropriate: Size Customized Frame aluminum alloy stamping/extrusion or according to client's request ... class 2,ISO 9001:2008,OHSAS 18001:2007 Application Industrial,medical,telecom,electronics,networking,communications,HAVC,broadband/CATV.,etc ... ...