2.778mm Stainless Steel Ball for Auto Parts, Medical Equipment, Cosmetics, Pen Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre:2.5mm 0.098inch AISI316L Stainless Steel Balls for Aviation and Aerospace 0.063G Next:3.175mm 1/8" AISI316L China Factory Supply Good Quality Stainless Steel Ball 0.130g