Notes: 714772-22581 PISTON ASSY, 0.50 OS is original YANMAR product. 714772-22581 PISTON ASSY, 0.50 OS4 is commonly used in transmissions/axles/engines L48ADVMK, L48EE-DVMK, L70ADVMK, L70EE-DVMK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849