TŁOK KOMPLETNY STIHL 025, MS250, MS250C Piston Diameter 42.5mm Piston height 34mm Ring thickness 1.2 mm (2 pieces) Piston pin 10mm x 28mm Original No. (Reference No.): 11230302011 Reference No. This is not an original spare part, but a high quality (OEM) replica part in OEM quality. Original part number and brand names are for comparison purposes only.