... can choose 35 # steelWith fire, 160 ~ 200HB requirements wear resisting, no violent impact, can chose 45 #steel -- sprocket -- Yamaha:AG100,DT100 ... series,RF series silent chain:SC3(CL06),Pitch is 9.525 conveyor chain:C2040,C2060,CA650 Leaf chain;AL422,BL546,LH0822,LL1044 ... TOP chain:TT,TS,TP --our technology-- ...