... Origin:Shandong ,China(Mainland) Brand name:jiuyu 1.stainless ball valve 2.low price & high hardness3.diameter :2 ... of 520,including 78 senior technicians, and 120 sets of domestically most advanced prduction equipments, annually producing ... s carbonated steel, chromium steel, stainless steel irregular balls, ball terainers, hardware and bicycling manufacturing, bearing, pharmaceuticals, gauges ...