1 × Lightly used Vortex Honda CBR600RR 03-19 520 Steel Rear Sprocket 45 Teeth (+3 over stock) 1 × Used but still in great condition (See pics) Vortex Honda CBR600RR 03-20 520 F5 Hardcoat Aluminum Rear Sprocket 44 Teeth (+2 over stock) 1 × Brand new never installed Vortex Honda CBR600RR 03-20 520 F5 Hardcoat Aluminum Rear Sprocket 43 Teeth (+1 over stock)