These kits contain all the needed Seals, O-Rings, Screws and Bolts to dissemble, clean and reseal your actuator.
There are 2 variants available:
9.5" which is for the rear diff of a 80 and 100 series Land Cruiser
8" which is for the front diff of an 80 series and the rear of a Tacoma, 4Runner and FJCruiser.
There may be other suitable applications for either kit, please check the size of your differential for the correct kit.