Steel Ball, Chrome Steel Ball, Stainless Steel Ball manufacturer / supplier in China, offering 20mm 25mm 28.5mm 28.6mm 33mm 35.56mmpp Polypropylene Plastic Hollow Ball for Deodorant, UV Resistant Hard Plastic Shade Ball Plastic Hollow Ball for Water Treatment, Factory Direct High Quality 4.8mm AISI1010 Carbon Steel Balls for Bearing and so on.