Notes: 714970-22581 PISTON ASSY, 0.50 OS is original YANMAR product. 714970-22581 PISTON ASSY, 0.50 OS5 is commonly used in transmissions/axles/engines L100AEDET, L100AEDEGTMTM, L100AEDTM, L100AE-DVYC, L100AE-DYC, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849