... ,1/2,9/16,5/8,3/4 copper plated steel balls G10 G16 G100 G1000 1/16,3/32,1/8,5/32,3/16 ... ,7/32,1/4,5/16 11/32,3/8,15/32,29/64,31/64,1/2 ... ,9/16,5/8,3/4 copper coated steel balls ... " 5/16" 5/32" 7/32" 1/4" 3/8" -7/8" 1/2" 1"4. Hardness: 58-62HRC5. Packing: Bag/Carton6. Brand :Ball ...