TŁOK KOMPLETNY STIHL FS55 AIP Piston diameter 34mm Piston height 33mm Ring thickness 1.5 mm (2 pieces) Piston pin 8mm x 22mm FS38, FS45, FS45C, FS45L, FS46, FS55C, FS55R, FS55RC, FC55, BG50 Original No. (Comparison No.): 41400302004 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.