TŁOK KOMPLETNY HUSQVARNA 353 AIP Piston diameter 45mm Piston height 37mm Ring thickness 1.5 mm (1 piece) Piston pin 10mm x 34mm Original number (comparison no.): 537 22 36-04 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.