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Mfg Item #: O-56
The Vortex Defender Flip Cap Objective 56mm is a virtually indestructible flip cap. It fits snug on almost all Vortex Optics and it has a flat spring that keeps your line of sight unobstructed. It has an Outside Diameter of 62 - 66 mm (2.4 - 2.6 inches) and it weighs 1.0oz.