Axles, CV shafts, driveshafts, differentials, u-joints, clutches, flywheels, transmissions, transfer cases, shift components and the bearings and seals that keep them turning.
Spline count is the number that decides fitment on shafts and clutches, and it is listed on every relevant product. Axle assemblies state whether they include the intermediate shaft. Clutch kits state whether the release bearing and pilot bearing come with them.
A remanufactured unit is not the same as a new one, and the listing says which it is. Core charges, where they apply, are noted in the product description.