PISTON INCLUDED WITH SEEGER ELASTIC BAND PIN Compatible with HUSQVARNA Models 51 - 51 EPA - 55 - 55 EPA DIMENSIONS: Cylinder diameter: 45 mm Bolt diameter: 10 mm Reference code: 179-245 Original part number: 503 16 77-01, 503 50 44-01, 503 50 44-02 HUSQVARNA