Extra factory-cut inner foam, maybe for decades down the line when this foam may wear out 🙂
Also great if you want the option to change from regular right shift and try split right shift down the line. Many HHKB users end up preferring the split right shift layout. Better get one now if you think you might want one 🙂
Split right shift requires a different PCB, top inner assembly, and inner foam. All other parts are interchangeable.
Please note that you are not buying from inventory. All new Model F items will be built to order at the factory. This item is just for the inner foam, not for any other parts.