CVT torque converter clutch set, Comet 30 profile. Set includes the Driver and driven pulley (also referred to as primary and secondary), drive belt and belt cover. Commonly (though not exclusively) used on 5.5HP, 6HP, 6.5HP gas engines. 30 series drive clutch has a bore size of 3/4” (0.75 inch) and the 30 series driven clutch has a bore size of 5/8” (0.625 inch). Commonly used with a 669 length belt (like our part number 30A7500) in '198F' profile scooters, go karts, dune buggies, ATVs, dirt bikes and other powersport applications.