... Free of maintenance; 4) Protect against dust. industial dust respirator Features of industial dust respiratorNon-woven fabric: Pp non-woven, ... ’s very convenient and practical.Applications of industial dust respiratorRubber, synthetic fur, metal casting, battery, ... industries, automobile manufacturing, etc. Item name industrial dust respiratorItem No. CFD2002TLayer 4plyColor blackPacking 20pcs/box, ...