Notes: 121400-12570 SEAT, RUBBER B is original YANMAR product. 121400-12570 SEAT, RUBBER B5 is commonly used in transmissions/axles/engines 3TNE74-AMM, 3TNE74-EAMM, 4TNE88-NSW, 4TNE88-NSR, 4TNE84-GB2B, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849