Vortex Defender Flip Cap Objective Lens 44 (48-53 mm)
New for 2016. This is the last flip cap you will ever need! Virtually indestructible, this cap will fit snugly on nearly all Vortex Optics® and features a snap flat spring that will keep your line of sight unobstructed.
Outside diameter: 48-53 mm | 1.89-2.08 inches