COMET DUSTER CLUTCH. ROTAX (THREADED) 3/4\" - 16 THREADED BORE.FOR 1-3/16\"" WIDE BELTS. CONTAINS SIX 205918 PUCKS AND 205858PINK SPRING. OLDER AND SMALLER SKI DOO SNOWMOBILES REQUIRETHIS BORE SIZETHE \'DUSTER\' IS THE BEST CLUTCH YET FOR ANY SNOWMOBILEAPPLICATION. WHEN YOU COMPARE THE COMET DUSTER TO ANY OTHERCLUTCH - EVEN INCLUDING THE 102C - THE OVERALL FEATURES OF THECOST