JW series string wound cartridgeis made of fiber yarn of various materials, which is tightly wound on the porous skeleton according to a specific process to form a honeycomb gradient structure that is sparse outside and dense inside, so the product has very excellent filtration characteristics and can effectively remove suspended matter, rust, particles and other impurities in the fluid. Our company adopts advanced winding technology to extend the service life by about 1/3, reduce the number of core changes and obviously reduce the user's cost of use.