Serpent SER600521 Clutch Bell 16T Vented For Serpent Cobra line, these hardened metal clutch-bells with venting / air conditioning pouches, laser etched with logo design and T. Associated products and services 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)