... 3.ISO 9001certification Polyester micron rated liquid filter bag1.Material:polyester2.Making way of the filter bag:Welded,sewed3.Size:1#,2#,3 ... .(#1,#2,#3, ) 3).Long time filter bags.(#1,#2,#3, ) 4).High flux filter bag.(#1,#2,#3, ) 5 ... ).Oil absorbed filter bag.(#1,#2,#3, ) 6).High efficiency filter bag.(#1,#2,#3, ) 7 ...