Notes: 129508-33050 O-RING is original YANMAR product. 129508-33050 O-RING5 is commonly used in transmissions/axles/engines 3TNM72-APB, 3TNM74F-SAAY, 3TNM74F-SAWM, 4TNV88-ZSTB1, 4TNV88-ZSTB, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849