SaferCCTV(TM) 47MM Cylinder Piston Kit for HUSQVARNA Replace Part#537 15 73-02/537157302 1.100%Brand new and high quantity 2.Replacement Part# 537 15 73-02 / 537157302 3.47mm Bore 4.INCLUDE:1 SET 47MM Cylinder AND Piston Kit WITH RING, PIN AND CIRCLIPS This is non original aftermarket parts, please check the pictures for compatibility before buy it