Custom fit for maximum protection, hunters and shooters have trusted Butler Creek scope covers for decades to protect their valuable optics. Their original Flip-Open scope cover is perhaps the most popular instant action scope cover on the market today. The custom fit water tight seal forms a friction mount that anchors them to your optic. They feature a weather proof air tight O-ring seal to keep out dirt and moisture ensuring a clear view no matter what the conditions. With fast flip tabs and a silent spring hinge, you'll be ready to place that perfect precision shot in an instant, with out spooking game. Protect your optics and maximize your hunt with the original Butler Creek Flip-Open Scope Covers!Specifications and Features:Butler Creek Flip-Open Scope Cover 30450 Objective Lens Cover Size 45 Fits 2.41" (61.2mm) Outside Diameter Objective Fast Flip Push Tabs Silent Spring HingeWater Tight Seal Airtight O-ringWeatherproofTested to -40 deg. F Ambidextrous Design Polymer Black