Notes: 129A01-22900 PISTON ASSY, 0.25 OS is original YANMAR product. 129A01-22900 PISTON ASSY, 0.25 OS5 is commonly used in transmissions/axles/engines 3TNV86CT-DMW, 4TNV86CT-PTB, 4TNV86CT-PTB1, 4TNV86CT-MKTFK, 4TNV86CT-KKTFK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849