Notes: 714988-22580 PISTON ASSY, 0.50 OS is original YANMAR product. 714988-22580 PISTON ASSY, 0.50 OS5 is commonly used in transmissions/axles/engines L100AEDEGMOR, L100AE-DEGMORYC, L100AEDEGMO2, L100AEDEGM2R, L100AEDEGMO2, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849