This high-quality tachometer drive gear is made to fit perfectly with the Cummins Engine KTA19, KTA38, KTA50, and NT855. The gear is manufactured in China and comes with a unit quantity of one. This part is perfect for those who are looking for a reliable replacement for their engine's tachometer drive gear. The gear is designed to work seamlessly with the engine, providing accurate readings and helping to keep your engine running smoothly. Its compatibility with various engines and its durability make it an excellent choice for those in need of a replacement or upgrade.