Serpent SER600521 Clutch Bell 16T Vented For Serpent Cobra line, these hardened steel clutch-bells with air flow / cooling pockets, laser etched with logo and T. Associated services and products Clutch bell 13T (SP-600216) Clutch bell 14T vented (SP-600519) Clutch bell 15T vented (SP-600520) Clutch bell 16T vented (SP-600521) Clutch bell 17T vented (SP-600522)