... we can supply Carbon Steel Ball Valves carbon steel ball valve1>Size kinds 1/4"~4" (DN6~DN100), have 1 ... ,2,3PC Carbon Steel ball valve as pictrues show2>Internal thread:NPT,BSPT,DIN2999,so ... in reply3>Thread made by CNC machining tools4>Fit in "Water, Oil, Gas, Nitric acid, Acetic acid"5>Detail specifications( ... our web and your inquiry email. Cast steel ANSI & DIN ball valve