This steering gearbox is made from TRW template. It contains items in it that TRW removed in the past. These items are considered better to have in the box. The last runs of TRW boxes also needed to be rebuilt when new. These do not. I currently have two types of boxes. One contains NOS steel caged FAG bearings and upgraded seals. The other contains standard type of bearings and seals that TRW was using. The NOS FAG bearings are steel caged and have more ball bearings. An option below allows you to pick the grease for your box. I use John Deere Corn Head grease. For the grease option, it comes empty by default but you may ask for it to be filled before it ships or you may fill it yourself.