1.material:high carbon chrome steel 2..diameter:2.381mm-25.4mm 3.certificate:ISO9001:2008 4.G100 G200 G500 G1000 G2000 Carbon steel ball Production ... (μm)101/16”~1”1-10,…..,-1,0,+1,…..,+9281/16”~1”2.00-12,…..,-2,0,+2,…..,+12401/16”~1”4.00-16,…..,-4,0,+4,…..,+16601/16”~1”5.00-25 ...