1. we manufacture the filter referring to the technology of japan. sodick (japan) and mitsubshi are our guide in manufacture. \n\n2. the material including filter paper and gumwater are imported from korea, germany, japan and usa. the filter is in high precision and has long service life. the quality of the filter could match with imported ones.\n\n3. we own the full set of auto-cut and advanced equipment to manufacture the filter. perfect test equipment could give guarantee to our quality.\n\n4. packing are in single packing or two filters in one carton.