Notes: 158552-51930 O-RING, 4D S10 is original YANMAR product. 158552-51930 O-RING, 4D S105 is commonly used in transmissions/axles/engines 2TNE68-CDM, 2TNE68-CMC, 2TNE68-CMC2, 2TNE68-EIK, 3TNE68-EIK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849