That’s for the Fuji filter adaptor and the Fuji hood.
You can then buy a B+W filter instead of the over-priced Fuji protector lol
I’ve not been able to buy a new official Fuji hood on its own so if you bought the WR kit and wanted a hood, you’d most likely end up with a extra adaptor ring.
I got a hood for my WCL too
B+W filters are amazing.