Notes: 129C00-22900 PISTON ASSY, 0.25OS is original YANMAR product. 129C00-22900 PISTON ASSY, 0.25OS5 is commonly used in transmissions/axles/engines 4TNV88C-PYBU, 4TNV88C-PTB1, 4TNV88C-PTB, 4TNV86CT-KKTF, 4TNV88C-DCP, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849