The John Deere AZ29327 Conversion Kit is a genuine OEM part designed for the complete tension roller system in John Deere combines. This essential kit ensures optimal performance and longevity of the tensioning mechanism. It is compatible with a wide range of John Deere combine models including the 9540 WTS, 9560 WTS, 9580 WTS, 9640 WTS, 9660 WTS, 9680 WTS, 9780 CTS, 9880 STS, 9540i WTS, 9560i WTS, 9580i WTS, 9640i WTS, 9660i WTS, 9680i WTS, 9780i CTS, T550, T560, T660, T670, W540, W550, W650, W660, S540, S550, S660, S670, S680, S690, S760, S770, S780, S785, S790, and C670 series.