Material: PP micro-fiber Features: low resistance, high dust-holding capability, high filtration efficiency, resistance to acid and alkali; meeting American Ashaer standard Filtration efficiency: 45%, 65%, 85%, 95% Can be used to make into bag type and plated air filters, which are widely used for air cleaning in large shops, airports, schools and hospitalsNew filter media made from electrostatic melt-blown, laminated with PET stiff substrate, so called "composite filter media" now developed in our factory. This makes the fabric with lower resistance, and largely improved filtration efficiency, and it is very environmentally friendly. We can supply the media from coarse filtration to medium and HEPA, ULPA grade, which is of lower cost than traditional media.And we also offer the compounded materials for all kinds of vacuum cleaner bags, and the material is featured very low resistance and excellent dust retaining capacity. The media contain several layers which have different functions. Moreover, we can also produce as per customer's requirements. Customized product order is also welcome.