Butler Creek 30390 Flip-Open Scope Cover Objective Lens 56.40mm Slip On Polymer Black

Simply the ultimate scope lens protection for hunters and shooters. They're custom-fit to your scope create a watertight airtight seal and open with a touch of your thumbs so you can put your shot through the narrow window of opportunity in the most extreme conditions. - Fast flip-open design keep your eye on the target. - Silent spring hinges won't spook game. - Water-tight custom-fit friction mounts anchor them to your scope. - Air-tight semi-O-ring keeps out dust and moisture. - Tested to -40°F. - Truly ambidextrous. - Weigh less than an ounce. - Also made for spotting scopes.