11/32,3/8,15/32,29/64,31/64,1/2,9/16,5/8,3/4 copper plated steel balls ... ,29/64,31/64,1/2,9/16,5/8,3/4 copper coated steel balls mild steel ball 1. Material: AISI1045-10852. Grade ... :G100 to G10003. Size: 1/8" 5/32 ... " 3/16" 5/16" 5/32" 7/32" 1/4" 3/8" -7/8" 1/2" 1"4. Hardness: 58-62HRC5. Packing: Bag/Carton6 ...