This Ring Gear and Pinion set is designed for use with Massey Ferguson tractors, specifically models 130, 135, 135 UK, 150, 20, 20C, 20D, 2135, 2200, 230, 231, 235, 240, 245, 30, 3165, 35, 35 Govt., 35 TURF, 35 Utility, 35X, 40, 50, TO35. The 37-tooth Ring Gear and 6-tooth, 10-spline Pinion Shaft make for a reliable and durable replacement part for your tractor. With a length of 9.875 inches (251 mm), this Ring Gear and Pinion set is compatible with various Massey Ferguson models.