The ultimate scope lens protection designed for hunters and shooters who demand reliable performance in extreme conditions. This custom-fit objective lens cover creates a watertight airtight seal while allowing instant access with a simple thumb operation.Size #9 - 1.485" (37.7mm) diameterFast flip-open design keeps your eye on the targetSilent spring hinges won't spook gameWater-tight custom-fit friction mounts anchor securely to your scopeAir-tight semi-O-ring keeps out dust and moistureTested to -40degF for extreme weather performanceTruly ambidextrous operationLightweight design - weighs less than an ouncePerfect for hunters and tactical shooters who need instant lens protection that won't compromise their shot opportunity in critical moments.