... steel ring or plastic collarSewn method: five-thread flat lockDescriptionHL FILTER adds a special ribbon to avoid leak from needle holes ... 364”(150mm)9”(230mm)P4S0.162.5124”(105mm)15”(380mm)Filter MediaNominal Micron RatingSizeBag ConstructionRing MaterialRing ConstructionNeedle Felt Polyester (PE) ... ,50,75,80,100,125,150,200,250,300,400,600,800,1250, 2500 PP10P2SSSS Nylon Monofilament Filter Bag