John Deere Original Equipment Belt Set – AH139436 Specifications: Belt Section (ALPHA) HC, Effective Length (IN) 78.7402, Number of Belts (UNITY) 2.0000, Width (IN) 0.8800, Thickness (IN) 0.5300, Matched Set (ALPHA) 2HC, Angle (ALPHA) 34, Material Spec (ALPHA) ARAMID, Note (A). Substitutes for AH120918 Fits the following John Deere models: 9400, 9410, 9500, 9500SH, 9501, 9510, SH9510, 9550SH, 9550, 9560SH, 9560, 9600, 9610, 9640WTS, 9680WTS, 9660WTS, 9660i WTS, 9640i WTS, 9680i WTS, 9650, 9660, T550, T560, T660, T670, W540, W550, W650, W660. This is an O.