Zhongshan h.r.t. precision steel ball co.,ltd is located in zhongshan city, guangdong province, china. our main products contain: 1) ball bearing (aisi52100 and austenitic stainless steel 316l, 420,420 c, 440440c, etc.); 2) stainless steel ball (300 series and 420,440,440c); 3) carbon steel balls; 4) glass ball. our company adhering to the "customer first, forge ahead" providing our highest quality and service. your enquiry is pretty welcome !