Notes: 714980-22580 PISTON ASSY, 0.50 OS is original YANMAR product. 714980-22580 PISTON ASSY, 0.50 OS5 is commonly used in transmissions/axles/engines L100AEDIFP2Y, L100AEDEIFP2, L100AEDIFP1Y, L100AEDEIFP1, L100AEDEGLEY, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849