Notes: 158552-61900 O-RING is original YANMAR product. 158552-61900 O-RING5 is commonly used in transmissions/axles/engines 2TNE68-CDM, 2TNE68-CMC, 2TNE68-CMC2, 2TNE68-EIK, 2TNV66-DMC, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849