Metal Gear 10T 14T Copper Motor Pinion for RC Car Crawler MN Model MN82 MN78 MN9 is a product-specific option in the car engine parts range, listed for engine-area servicing, replacement or fluid maintenance. The product title highlights metal. The specific metal gear 10t 14t copper wording helps identify the product type more clearly within the car engine parts range. The listing provides color choices such as 1PCS 14T and 1PCS 10T. The final selection should be based on the page images, listed specifications, compatibility text and chosen variant.