Notes: 129486-42140 O-RING, G30 is original YANMAR product. 129486-42140 O-RING, G305 is commonly used in transmissions/axles/engines 4TNV88-ZSTB, 4TNV88-ZSTB1, 4TNV88-ZSTB, 4TNV88-ZSTB1, 4TNV88C-PYB, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849