Basis weight: 15 gsm Material: pp Nonwoven technics: melt-blown Initial Efficiency: â?§95% Initial Resistance: 10±3 Pa (0.30um, 32L/Min, NaCl) Roll width: 1500mm Roll Length: 1000 meters Packing: Roll Characteristics: 1) From F6-H14, we can provide you full choice. 2) The filtering medium used consists of two layers: PP melt-blown nonwoven fibres and pet backing sheet. 3) High efficiency & low pressure drop. 4) High capacity of dust hoding. 5) Easy to operate, pleat, assemble. 6) Effectively reduce dust, dust mite, allergen, bacteria in the air. 7) Widely used in the fields of air cleaner, ventilation system filtration, medical filtration, etc. 8) Backing sheet can be treated for additional function , for example, Anti bacteria, Antiviral Activity , color and others.