... manufacturing various type of Dustproof respirators like FFP1-3, of European Standard EN149:2001 1. raw material:PP Granules from USA or ... %Exterior appearance Neat and no contaminationAir flow rateL/min60ResistancemmH2O≤12Penetration%≤2.5Tester and AerosolTSI-8130, paraffin oilTDK-P3- meltblown filter media ... presented with each batch when shipment. filter media for FFP1,2,3 respirator