Notes: 119818-22930 PISTON W/RING OS=.25 is original JOHN-DEERE product. 119818-22930 PISTON W/RING OS=.255 is commonly used in transmissions/axles/engines 3TNE78A-EHP, 3TNE78A-EMG, 3TNE78AG1A01, 3TNE78AG2A01, 3TNE78ACG1A1, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849