Notes: 129003-22950 RING SET, 0.25 OS is original YANMAR product. 129003-22950 RING SET, 0.25 OS5 is commonly used in transmissions/axles/engines 3TNE82A-AF, 3TNE82A-DGD, 3TNE82A-EAF, 3TNE82A-ECB, 3TNE82A-EPM, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849