... cb400 2.Good Raw Material 3.Excellent Surface 4.Customizable 5.OEM offer cb400 Full set sprocket in Black Color powerful ... , quenching,tempering, HRC50 ~ 60 have impact load, Teeth more than 25, can choose 35 # steelWith fire, 160 ~ 200HB requirements wear resisting ... .652015.87510.166.355.081526.553015.87510.169.405.081526.5 --factory visit----product show----production line--∞if you have any ...