... /32,3/8,15/32,29/64,31/64,1/2,9/16,5/8,3/4 copper plated steel balls G10 ... /32,3/8,15/32,29/64,31/64,1/2,9/16,5/8,3/4 copper coated steel balls mild ... /32" 1/4" 3/8" -7/8" 1/2" 1"4. Hardness: 58-62HRC5. Packing: Bag/Carton6. Brand :Ball king7.MOQ:1 ... %S%HardnessAISI 10100.08~0.130.30Max0.50Max0.07Max0.06MaxHRC 58-62 AISI 10150.13~0.180.10~0.300.30 ...