These rubber caps are for my Leica 7x42's. The original caps broke where the strap joins the ring and getting replacements from Leica was like looking for hen's teeth and the cost was high. I tried Butler Creek flip ups and these kept breaking at the hinge (Yes, my bino's are well used!) When i found these on Amazon i was a bit aprehensive because they seemed 'too cheap' how wrong i was, they are superb. Anyone out there with expensive binoculars needn't break the bank for lens covers, get a pair of these. They are a snug fit on Leica Ultravid 7x42 and at this price, i can buy five sets for the cost of the original replacement from the manufacturer.