Replacement piston in very good quality matching the original measurements 38.0mm for the original cylinder. Fits Puch motors 2-speed, 3-speed, Puch Maxi engines and Puch Maxi 2-speed automatic and Puchfahrzeuge DS 50 3-speed, Maxi, Maxi 2-gear, Maxi P1, X30 and MS 50 with 12mm piston pin. Supplied as shown. Piston diameter: 38,00mm Gudgeon pin: 12mm piston height: 52.5 mm compression height: 26mm