... 5mm length: 50mm---6000mm male and female threads Johnson water well screen Materials: carbon steel and stainless steel (302,304, ... structure and high open area, as well as accurate slot dimension. At the same time, water well screen have heat-resisting, anti-corrosive ... clogging and ensures an uninterrupted flow.A uniform and efficient well development due to the continuous slot opening.Ladder-like ...