This Vortex 526ZK-42 CAT5 Aluminum 42 Tooth 525 Rear Sprocket is a top-quality product designed for motorcycles and scooters. It is made of durable aluminum material that is built to last. The sprocket is colored black and has a vintage design that adds to its aesthetic appeal. The manufacturer part number for this sprocket is 526ZK-42, and it is made in the United States. It is important to note that this product contains California Prop 65 warning regarding cancer and reproductive harm. This sprocket fits on the rear of your motorcycle or scooter and is a great addition to your transmission and drivetrain parts.