1)Our air filter is manufactured under ISO9001 2)High quality with lowest price 1)about productsOur air filter is made of pure wood pulp,it's one of the high quality in this line.Our air filter have such useages:a. melt-blown(can filter out all the larger particles),b. high efficiency(to reduce the number of particles through the filter),c. to prevent engine early wear and tear(to prevent air ...