My Nikon D3 an my father's D4 had their covers broken because of handling and age, I couldn't find the correct dimensions, so I grabbed my trusty calippers and gave it a go. It's not an exact match, but it does the job, I do believe this piece works for most Nikon FX cameras like D3, D3s, D3X, D4, D4s, D5, D6, D600, D610, D700, D750, D780, D800, D810, D850 although I'm not sure about that.