Notes: 24356-020210 O-RING, 4D2021 is original YANMAR product. 24356-020210 O-RING, 4D20215 is commonly used in transmissions/axles/engines 4TNV94L-XHYB2, 4TNV94L-XHYB, 4TNV94L-PIKA, 4TNV94L-PIKA, 4TNV94L-PIK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849