good quality , high effeciency, long life service, competitive price Material: Quality Nylon (polyamide) or polyester monofilament / multifilament meshes Construction: Sewn or welded Micron Rating: 25~ 1250 Collar Type: Steel ring or plastic collar Sewn method: five-thread flat locFeatures:Nylon Monofilament filter bags are WashableSF FILTER adds a special ribbon to avoid bypass from needle ...