through hardened ball for polishing material:AISI1015,1085,52100 size:2mm-25.4mm grade:G100-G1000 hardness:633-66hrc Production name high hardened steel balls for polishingsize2MM-25.4MMGradeG28,G40,G80,G100,G200,G500,G1000,G2000HRC58-62hrcQuality certificateISO 9001:2008/SGS test report/ROHS reportPacking1, 25kg/carton then 50 cartons in one steel pallet packing2,25kg/carton without steel pallet ...