A Pair of Binoculars Rubber Eye Cups Eye Guards Caps AER232 ID 30MM Suit for 28mm - 32mm Microscope Eyepiece Telescopes Eyecups

The rubber was real stretchy and it took a little maneuvering to get them on but they fit snugly on my Aristo 7 x 35 binoculars. The originals were more of a hard, flexible plastic. In addition to the two eye cups there were two other pieces that I don't know if they were supposed to be included. One looked like it was an eyepiece cap/cover although it didn't fit these eye cups. (?) The second piece (maybe an installation tool?) wasn't a cap but looked like you could put the eye cup over it to work it on the lens. No clue-only guessing. In any event this was my second try at getting eye cups and they seem to fit. They are as flexible as rubber bands.

I have an old set of binos that look like they lived in the bottom of a toolbox for a while… no lens scratches, but a little beat up and missing one rubber eyecup. So still usable, just not very comfortable. These were the right size to slip snugly over the eyepieces and give my old binos a new lease on life!