AISI304 316 420 440c Polish Steel Ball G100 G500 G1000 304 Stainless Steel Ball Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：R1212/R1212ZZ Deep Groove Ball Bearing for The Medical Instrument Next：Nickel Plated Carbon Steel Ball 4mm/6mm/8mm/10mm/12mm Bulk Chrome Steel Balls for Bearing
