Bicycle steel balls, 6.35, 3.175, 7.938, 3.969, 4.762mm, 58 to 65HRC, heat treating
Bicycle steel balls, 1/4-, 1/8-, 5/16-, 5/32- and 3/16-inch, factory directly
Bike steel ball, carton steel, chrome/CP surface, 1/4, 1/8, 5/16, 5/32 and 3/16", 25/50kg/bag
