... m2/min: 2.4 Tensile strength(N/5*20cm): PTFE filter bagMaterial: PTFE fiberSpecifications: Gram weight (g/m2)508Thickness(mm)2 ... : singeing calendaring and Teflon coating Applications: it is suitable in mechanical, mechanical and electrical, aviation, metallurgy, engine bed, lightly spins professions, ... , dustproof, quakeproof, heat-preservation, sound-insulated, filters, polishing. PTFE filter bag