... (Mainland) Brand name:jiuyu 1.stainless ball valve 2.low price & high hardness3.diameter :2.0--20mm4.thick: ... establishment of Yuncheng Dongsheng Industrial&Trading Co.Ltd in 1986, It has endeavoring to expand its original ... steel, stainless steel irregular balls, ball terainers, hardware and bicycling manufacturing, bearing, pharmaceuticals, gauges and precise indstrements. high quality ball valve