Dear: I hope that you are ok. we are manufacture about prime wooden pulp filter paper for automotive filter use,the following is our products: air filter paper machine oil filter paper fuel oil filter paper and if you have any interesting,please contact with me ! best wishes for you yours sincerely Miss Sherry The production examination is qualified by “quality supervise test center of nation car (ChangChun)” “China light industry head office of paper quality supervise detect (TianJin Station). HengShui National Prestige Filter Paper Co.,Ltd. Red Flag East Street of Anping,Hengshui City Hebei province of China.