Cheap 5/16" 7.938mm Carbon Steel Ball for Bicycle Trolley Wheel Shandong Jinnai International Trade Co., Ltd. Base Info Description Pre：9.52/10/10.31/11/11.11/11.5/11.5/11.9/12/12.3mm Soft Carbon Steel Ball AISI1010-AISI1015 Next：3.175mm 1/8 G100 Low Carbon Steel Ball for Locks
