... filter bag.(#1,#2,#3, ) 5).Oil absorbed filter bag.(#1,#2,#3, ) 6).High efficiency filter bag.(#1,#2 ... ) #2 (Size 2) #3 (Size 3) #4 (Size 4) #5 ( Plastic Housing) C: PRE(PP ring of Eaton style ) PRF ... FLS (Fasten Line Strip ) D: Micron Rating PO & PE: 0.5-200 μm NMO: 25-1200μm E: SG (All Sewing ... V style) H: SF (Silicon free) ST (Standard) 1/5/10/25/50/75/100/150/200 micro liquid filter ...