The slots of this kind of bridge slot screen are punched precisely in a flat sheet which then is rolled into a pipe. The sand and gravel can't easily block the slot because of the special bridge style design, and bridge slot screens has great mechanical strength and water entering capacity. Meanwhile, bridge slot screens use steel punching technology and is rolled in many ways, so they are light, cheap and easily operating. 2.Advantages 1)High strength through resistance to twisting, compressive, and tensile forces 2)A smooth bore that does not impede the passage of probes, tools, etc. 3)Formations with large particle sizes 4)Large diameter wells 5)Low to medium flow rates 3. Materials of construction All types of steel such as carbon steel, galvanized steel, coated steel and stainless steel types 304, 304l, 316, 316l & 430, for example. Diameter (mm) 146 159 219 273 325 377 426 529 Id 130 140 138 200 198 254 250 246 305 300 297 357 350 346 406 400 398 502 500 498 Thickness 5 5 6 5 6 5 6 8 5 6 8 5 6 8 5 6 8 6 7 8 Coupling od 146 160 162 220 226 274 278 278 325 328 329 377 378 379 426 428 432 529 530 531 As your requirement