Louvered Filter Kits, SINWAN Ventilator Filter Kit Specifications Grille & Retainer (G & R); Made of thermoplastic ABS resin, rated UL94V-0, 1 or 2, UV resistance. Retainer air outlet 45 degree. Gasket version made of EVA. Filter Media (M): Made of glass fiber nylon polyester, 3.1mmAq initial ~ 40mmAq terminal temp. up to 100degree C, moisture resistance up to 100%RH Optional filters made of PU form medias, or curved & corrugated metal screen. meshes 15,30,45,60 PPI available. Filtering Particles Efficiency: Fiber nylon 560gm/m2, filtering degree 80~83% by weight, dust, powder particles dia. 5um over Media PU form, or curved metal screen meshes 15,30,45,60 PPI for choice, normally 30 or 45 PPI. Service Temperature: -30~ +65 degree C, or higher temperature available on request. RFG (Retainer + Filter + Grille = SINWAN RFG) Replace the Filter Type A = Open Type B = Pull Type C = Push Type   RFG119A , For 119mm(4.7inch) RFG172A , For 172mm(6.8inch) RFG200A , For 200mm(8inch) Edit Edit Edit RFG280A , For 280mm(11inch) RFG119B , For 119mm(4.7inch) RFG172B , For 172mm(6.8inch) Edit Edit Edit RFG200B , For 200mm(8inch) RFG254B , For 254mm(10inch) RFG280B , For 280mm(11inch) Edit Edit Edit RFG80C , For 80mm(3.1inch) RFG92C , For 92mm(3.6inch) RFG8092A , For 80/92mm(3.1/3.6") Edit Edit Edit