Product DescriptionProtect your optics with the Butler Creek Flip-Open Objective Scope Cover. Custom-fit for objective bells measuring 61.20 mm outside diameter (Size 45), this lightweight black polymer cover seals out dust and moisture with a watertight, airtight O-ring and opens instantly with a thumb for fast shots. A silent spring hinge and ambidextrous tabs keep you on target without spooking game, and the durable design has been tested to perform down to -40AdegF. The friction-mount fit range is 0.01" under to 0.025" over the stated measurement for a secure hold in extreme conditions.Product HighlightsFlip-open design with silent spring hinge for instant, quiet accessWatertight, airtight O-ring seal keeps out dust and moistureCustom friction mount fits 61.20 mm OD objective bells (Size 45)Durable black polymer construction weighs less than an ounceTested to -40AdegF with ambidextrous push-tabsSpecsCover Type: Objective lens cover, flip-open styleSize: 45 (fits 2.41 in / 61.20 mm outside diameter objectives)Material: PolymerColor: BlackOperating Temperature: Tested to -40AdegFFit Range: 0.01" under to 0.025" over the given measurementUPC: 051525304500Manufacturer Part Number: 30450Brand: Butler CreekDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.