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