I have 12 tooth, 13,14, and 15 tooth sprockets let me know which one you want Machined from impact and wear resistant chromoly steel Inner splines are broached to provide maximum spline-to-countershaft contact - this helps distribute driveline forces over the largest possible area Heat-treated, then finished with a nickel coating for corrosion resistance and lubricity Be sure to check for clearance when ordering sizes larger than stock