6.42mm Carbon Steel Ball AISI1010-AISI1015 Stainless Steel Bearing Ball AISI304 AISI316 AISI420 AISI440 Carbon Steel Ball Chrome Steel Ball with All Sizes Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：Solid Carbon Steel Ball with Hole for Furniture and Massage 3.175mm 3.966mm 4.762mm G1000 Next：5.556mm 6.350mm 7.937mm Steel Grinding Ball/Drilled Steel Ball for Special Valves, Ball Transfer Units
