Notes: 729907-22950 RING SET, 0.25 OS is original YANMAR product. 729907-22950 RING SET, 0.25 OS5 is commonly used in transmissions/axles/engines 4TNV98-YTBL2, 4TNV98-YTBL, 4TNV98-VTBZ2, 4TNV98-VTBZ, 4TNV98T-GGEH, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849