sprocket 1,25b-120b all type 2,high precision cnc tech 3,black ... anti-corrosion 4,large production, large stock Sprocket 1, all made by advanced CNC lathe, pass ISO, ANSI,DIN ... quenching. 4, we also provide nonstandard( according to the customer drawings) and standard(the metric system) sprockets 5, ... negotiablePackagingInner plastic bag and outer carton box or customer requirement. weld on sprocket