Notes: 24311-000200 O-RING, 1AP20.0 is original YANMAR product. 24311-000200 O-RING, 1AP20.05 is commonly used in transmissions/axles/engines 4TNV98-ENLAN, 4TNV98-ENLANA, 4TNV98-ENLANA, 4TNV98-ENLAN, 4TNE84T-ENSW, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849