Vortex 530 Cat5 Aluminum Rear Sprocket Honda CBR / Rc51 Features: Lightweight standard aluminum racing sprocket 100 percent CNC manufactured in the USA Specially formulated alloy per Vortex specifications Anodized to prevent corrosion Unique tooth design increases sprocket longevity Vortex patented sprocket design is unlike any other sprocket Note: Sprocket shape and size will vary depending on model, picture is for reference only