CYLINDER KOMPLETNY HUSQVARNA 50, 51, 55 EVEREST NIKASIL Piston diameter 46mm Ring thickness 1.5 mm (1 piece) Piston pin 10mm x 33mm Original No. (Comparison No.): 503 92 41-71, 503 16 83-01, 503 60 91-71, 503 16 91-71 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.