This 54" deck spindle assembly is designed for use with Cub Cadet lawn mowers, and is compatible with the MTD Troy Bilzer 918-06978 model. The unit type is a single spindle, and the manufacturer part number is 618-06978. The spindle is suitable for use with a variety of lawn mower brands, including Cub Cadet. Its size is one spindle, and it comes with a unit quantity of 1. This product is perfect for those in need of a replacement spindle for their lawn mower, and is sure to fit Cub Cadet models.