The kit includes the S6 holder, S6 adaptor mount for the Canon RF 10-20mm f/4 L IS STM, a NiSi True Color C-PL, lens cap, and a case to store... True Color CPL - To avoid the yellow color cast compared with regular CPL Aluminum-Alloy Holder with CNC technology, rapid installation and quick release The S6 filter holder kit consists of three components: the main adapter ring (made specifically to fit the Canon RF 10-20mm f/4 L IS STM lens), the True Color NC CPL filter, and the square filter frame.The S6's main adapter employs the same matting treatment as high-end lens hoods to ensure no ghosting or flare Allow 360-degrees rotation with integrated locking system to lock the front filter holder NiSi S6 150mm Filter Holder Kit with True Color NC CPL for Nikon Z 14-24mm f/2.8S | NiSi Optics USA Square ND Filter Holder NISI S6 Holder Kit Filter Holder For Canon RF 10-20mm F4 Camera 360 Rotation Filter Mount