This is a full set up kit to do the job right. It includes:
-Carrier bearings (Factory Toyota)
-Pinion Bearings (KOYO)
-Pinion Nut
-Pinion Seal
-Crush Sleeve or preload shims
-Pinion Shims
-Loctite
-Marking Compound
-Adjustable Differential Shims
-Oil Slinger
-Ring Gear Bolts