Order Includes: 1x Diffrential Gear. Compatible with Yamaha models: Rhino 660 YXR660F 2007. Part Number: 5UG-Y4612-00-00. Dimensions : Total Length Of Small Gear: 4.72" 120mm, Splin Width Of Small Gear: 0.98" 25mm, Outer Diameter Of Big Gear: 6.22" 158mm, Inner Diameter Of Big Gear: 1.57" 40mm. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
