Notes: 24356-010180 O-RING, 4D1018 is original YANMAR product. 24356-010180 O-RING, 4D10185 is commonly used in transmissions/axles/engines 4TNV88-BPTBZT, 4TNV88-BPTBZ, 4TNV88-BPTB1, 4TNV88-BPTB1T, 4TNV88-BPTBT, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849