... ,#2,#3, 4 ) 2).Absolute micron filter bags.(#1,#2,#3, 4 ) 3).Long time filter bags.(#1,#2,#3, 4 ) 4).High flux filter bag.(#1,#2,#3, 4 ... ) 5).Oil absorbed filter bag.(#1,#2,#3, 4 ) 6).High efficiency ... )SR4 (Steel Ring 304)SR6 (Steel Ring 316)FLS (Fasten Line Strip )D: Micron RatingPO & PE: 0.5-200 μm NMO ...