HL FILTER develops,welded added heat seams to double protect filter bags from damage in seams. Nylon Monofilament Filter Bag SpecificationMaterial: choice Nylon (polyamide) or polyester monofilament/ multifilament meshes.Micron rating:25-1250Construction:welded or sewnCollar type: steel ring or plastic collarSewn method: five-thread flat lock DescriptionHL FILTER adds a special ribbon to avoid ...