Notes: 714970-22550 RING SET, 0.50 OS is original YANMAR product. 714970-22550 RING SET, 0.50 OS5 is commonly used in transmissions/axles/engines L100AEDET, L100AEDEGTMTM, L100AEDIFP2Y, L100AEDEIFP2, L100AEDIFP1Y, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849