Sparex source: https://us.sparex.com/piston-ring-set-59550.html Product: Piston & Ring Set - Sparex S.59550 SKU: S.59550 Listing note: Piston Length = 105.36mm. Chamber Depth = 17.65mm. Chamber Ø64mm. Pin Ø40mm. Compression Height = 71.5mm. To Fit Bore Ø102mm. No. of Rings = 3. Al-Fin Ring Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.