Wide Compatibility: Compatible with John Deere LT133, LT155, LT166, LTR155, X and L model lawn tractors. Precise Fitment: Inner diameter 17mm, outer diameter 94mm, and thickness 22mm, ensures accurate belt alignment. Durable Construction: Made from high-strength metal for excellent wear resistance and long-term performance. Smooth Operation: Maintains proper belt tension, reducing vibration and extending belt life. Easy Replacement: Direct fit, replace AM118447, simple installation with no modification required., Manufacturer: YINETTECH