This Tenebraex amber see-through ocular flip cover provides protection to your lens and flips up out of the way when it is time to shoot and includes an adapter ring. Fits the Following Delta Scopes: Stryker HD 4.5-30x56Stryker HD 5-50x56Fits the Following Meopta Scopes: MeoPro 3.5-10x44MeoPro 3-9x42MeoPro 3-9x50MeoStar R2 1.7-10x42MeoStar R2 2.5-15x56MeoStar R2 2-12x50Fits the Following Nightforce Scopes: ATACR 4-16x42 F1/li>ATACR 4-16x50Fits the Following Steiner Scopes: M5Xi 1-5x24M5Xi 3-15x50M5Xi 5-25x56Other Fits: Athlon Cronus BTR 4.5-29x56 FFPSwarovski 6-18X50 Habicht Tenebraex Ocular Amber Cover with Adapter Ring UAC015-ACR