Airtight semi-O-ring seals out dust & moisture. Spring action lids pop open at the touch of a thumb. Exact sizing insures a true seal when closed.
|Mount Type||Slip On|
- Very Nice Covers (review by Lee on 10/24/2015)
These fit tight, the picture is showing the Eyepiece Cover, the Objective doesn't use the push button, but they work great, thumb pop opens it. You get a snap when it closes. They have one tight seal.