Notes: 129901-55840 O-RING is original YANMAR product. 129901-55840 O-RING5 is commonly used in transmissions/axles/engines 4TNE98-TBZ, 4TNE98-BQCKST, 4TNE98-BQCKS, 4TNE92-HHYF, 4TNE98-HAF, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849