Pinion Gear Set: 17T. 18T 19T 20T 21T x 48P x 0.125 bore

All warranties and guarantees, including missing items, are handled directly by the manufacturer of that item. Should there be any problem with a product, you (The Customer) will need to contact the manufacturer to obtain service. Manufacturer contact information is available upon request. We must be contacted for a return authorization number before returning items for any reason. We cannot accept returned items that have been opened or are not in their original sealed factory containers.