Notes: 719516-22030 PISTON ASSY, 0.25 OS is original YANMAR product. 719516-22030 PISTON ASSY, 0.25 OS2 is commonly used in transmissions/axles/engines 2TNV70-APK, 2TNV70-APK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849