Vortex Defender Flip Cap Objective Lens 50 (55-59 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: 0-50 | 55-59 mm | 2.16 - 2.32 inches