The filte paper that my factory produces has the ability of well venilated, and filter function good and keep the ash hasgreat capacity, the service life is long. The product is applicable to air, engine oil and pure and filter machine in fuel etc. It has already passed the examination by many authority organization, such as "chang chun automobile research bureau""the research bureau of Shanghai"etc. The product function attains or exceeds the technique request of the filter paper completely.