I'm Joanna from China guangxing screens company , Our company is a professional manufacturer of wedge wire screen, water well screen, Johnson well screen for shallow ground dewatering monitoring well. My email: [email protected] Guangxing wedge wire well screen(johnson type well screen) Diameter(inch):1.5"(38), 2"(50), 3"(73), 4"(108), 6"(159), 8"(219), 10" (250), 12"(273), 14"(325); slot(mm):0.1, 0.15, 0.25, 0.5, 0.76, 1.0, 1.25, 1.50, 1.75, 2.0, 2.5, 3.0, 4.0, 5.0 ;; Open Area:10%--60% Length:2.95m/5.85m Advantage ::: The stainless steel wedge wire screen(Johnson well screen tube) eliminates clogging due to corrosion or deterioration due to chemical action. It has a reverse self cleaning design to void choking. This well screen widely used in gravel wall wells, tubular wells, rock wells, horizontal collector wells, monitoring wells, dewatering wells. If you looking for it ,Please feel free to contact with me without any hesitate ,my email: [email protected]