... jiuyu 1.stainless ball valve 2.low price & high hardness3.diameter :2.0--20mm4.thick:5mm5.grade:10 ... prduction equipments, annually producing 5,000tons of steel balls.The company's carbonated steel, chromium steel, stainless ... steel irregular balls, ball terainers, hardware and bicycling manufacturing, bearing, pharmaceuticals, gauges and precise indstrements. high quality ball valve