Notes: 129033-01770 PLUG, NPT1/2 is original YANMAR product. 129033-01770 PLUG, NPT1/25 is commonly used in transmissions/axles/engines 4TNV88-BKGWL, 4TNV88-BKGWLF, 4TNV88-DSA, 4TNV84T-DSA, 4TNE84-GB2B, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849