... high frequency quenching, twice abrasive resistance as much as common sprocket;hardness5\OEM offered, only you offer the technical drawing, we ... 7\our company gain ISO9001:2008 QULITY MANAGEMENT CERTIFICATE SPECIFICATIONRear sprocket 30T/34T/35T/36T/37T/38T/39T40T/41T/42T/ ... SUPRAFITNEW,WIN,NEWTECH,GL100,REVO,GTO,THUNDER,A100,SMASH,YB100,KAZE,JUPITER,BLITE,SHOGUN,SATRIA,NINJA,GS1,VIX10N,JUPITER,TORNADO, ...