Included in the ''KIT'' is the Mk II lens hood and the Adapter ring. (Not Pictured)
The Adapter ring is needed if you wish to use a filter with your Mk II hood.
The Adapter has been designed specifically for the X100V to allow for the extra movement the lens needs, however it will fit any X100 series camera. It is compatible with most 49mm filters.
The following filters have been tested.
Hoya 49mm UV(C) Digital HMC Screw-in Filter,Y5UVC049
B+W 49mm XS-Pro UV Haze MRC-Nano 010M Filter
Tiffen 49mm Pro- Mist 1/4 Filter