1/16,3/32,1/8,5/32,3/16,7/32,1/4,5/16 copper plated steel balls G10 G16 ... steel 1/16,3/32,1/8,5/32,3/16,7/32,1/4,5/16 copper coated steel balls mild ... G100 to G10003. Size: 1/8" 5/32" 3/16" 5/16" 5/32" 7/32" 1/4" 3/8" -7/8" 1 ... HardnessAISI 10100.08~0.130.30Max0.50Max0.07Max0.06MaxHRC 58-62 AISI 10150.13~0.180.10~0.300.30~ ... .04Max 1/16,3/32,1/8,5/32,3/16,7/32,1/4,5/16 copper plated AISI52100 steel balls