2 Replacement Spindle Assemblies plus 8 mounting bolts for Cub Cadet, Troy Bilt (MTD) 918-0427, 618-0427. Also 618-0427C, 918-0427C, 618-0324, 918-0324 . 2 Complete spindle assembly plus 8 mounting bolts (self tapping). Includes housing, shaft, bearings, and pulley. Pulley is 5 1/2" Diameter Has grease zerk. Mounting holes are not tapped (same as MTD FSP spindles), 8 self tapping bolts included.