It will not fit 5D 6D series cameras. Adapter has latest digic 8 chip for new Digital rebel T8i and 90D cameras. 

Shipping is free within USA and $7 worldwide via USPS first class mail. You can choose faster and more expensive shipping during check out.  

Nikon G to Canon EF adapter will adapt Nikon Ai-s, AF-S G series lenses (such as 12-24mm AF-s)  to Canon EOS EF mount cameras. Such as 6T, 50D, 60D, etc.  Please note that for some reason it does not lock on 5D series cameras. 

Adapter has aperture control ring. It has a chip for focus confirmation. 
Compatible with both Nikkor AF-S G lens &  F lens (include non-AI & AI lens mounts).
All metal structure Allows focus to infinity.  Adapter has latest Canon Digic 8 chip.