Camera Accessories
KamKorda Lens Filter Kit 67mm + RF 100-400mm F5.6-8 IS USM, RF-Mount Lens/Full-Frame Format, Nano USM AF Motor, Optical Image Stabilizer, Super Spectra Coating + 2 Year Warranty
RF-Mount Lens/Full-Frame Format Aperture Range: f/5.6 to f/45 One UD Element, One Aspherical Element Super Spectra Coating Nano USM AF Motor
https://www.bizrate.co.uk/cameraaccessories/kamkorda-lens-filter-kit-67mm-oid33385027749.html