Notes: 714320-22580 PISTON W-RING OS0.5 is original YANMAR product. 714320-22580 PISTON W-RING OS0.55 is commonly used in transmissions/axles/engines L100N6FJ1P1AA, L100N6DA1F1AA, L100N6AJ1R2AA, L100N5EA1C1AA, L100N5CJ1F1AA, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849