The JT Rear Sprocket in Black with 45 teeth is a high-quality performance part made from durable 7075-T6 aluminum. It is designed for rear placement on vehicles and comes with a 90-day warranty. This sprocket is compatible with a chain size of 520 and offers free shipping within the lower 48 states. With an average delivery time of 2-3 days, this sprocket is a reliable choice for motorcycle and scooter enthusiasts looking to upgrade their transmission and drivetrain system.