4.49mm Size and AISI 52100 Material G100 High Precision Carbon Steel Balls for Tumble Finishing 0.369g Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre:Large Supply of Various Specifications of Environmental Protection Smooth Bright Carbon Steel Ball Can Be Electroplated Solid Next:5.4mm 0.210inch Chrome Steel Material and G10-G1000 Percision Steel Ball for Belt and Roller Conveyors 0.642g