Notes: 129906-22900 PISTON ASSY, 0.25 OS is original YANMAR product. 129906-22900 PISTON ASSY, 0.25 OS5 is commonly used in transmissions/axles/engines 4TNV94L-XHYB2, 4TNV94L-XHYB, 4TNV94L-PIKA, 4TNV94L-PIK, 4TNV94L-PHYBY, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849