Notes: 129509-22950 RING SET, 0.25 OS is original YANMAR product. 129509-22950 RING SET, 0.25 OS5 is commonly used in transmissions/axles/engines 4TNV84T-ZXGYB, 4TNV84T-ZXKAT, 4TNV84T-ZXKVA, 4TNV84T-ZXKVA, 4TNV84T-ZXKAT, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849