Notes: 714980-22621 PISTON ASSY, 0.25 OS is original YANMAR product. 714980-22621 PISTON ASSY, 0.25 OS5 is commonly used in transmissions/axles/engines L100AEDET, L100AEDEGTMTM, L100AEDTM, 6600TE5EBG1, 6600TE5EBN1, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849