Notes: 129904-22940 PISTON ASSY, 0.25 OS is original YANMAR product. 129904-22940 PISTON ASSY, 0.25 OS5 is commonly used in transmissions/axles/engines 4TNE92-BRTL, 4TNE92-HHYF, 4TNE92-POM, 4TNE92-POM, 4TNE92-HHYF, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849