Upgrade or replace with confidence using this Aftermarket piston ring set. Compatible with models including 4045T, 6068T, 6400, 6400SE, 6500, 6800, 6900, 7600. Interchangeable with OEM John Deere part number(s): DD11831, RE15674, RE507852, RE66820. Designed to fit John Deere equipment and built for long-lasting performance.