Stainless Steel Ball, Carbon Steel Ball, Bearing Steel Ball manufacturer / supplier in China, offering ISO Certified Functional Glass Marbles for Pumps and Valves – High Precision Industrial Applications, Quality Glass Marble for Pump Applications in Chemical Industry, High Precision 6.35mm Solid Steel Balls – AISI 304 316 420 440 Stainless, Chrome, Carbon Steel for Rotary Cleaning Valve, Nail Polish Machine and so on.