Dedicated to the Nikon Z 7 and Z 6 mirrorless cameras, the DK-29 Rubber Eyecup is a spare or replacement item for the one originally included with the camera. This eyecup blocks stray light from causing glare and simultaneously improves viewing comfort.
Purchased to replace original one that got damaged on my Z5II. Made by Nikon for Nikon so guaranteed to fit. I don’t like to purchase an off brand that may say “will work with Z5II”
Not sure why Nikon is insisting on this flimsy design. Had a very similar eyecup on my D90 which also broke in a few years after occasionally removing for cleanup. Let's see how long this is going to last.