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.

50mm Objective: Outside diameter: 55-59 mm | 2.2 - 2.3 inches

44mm Objective: Outside diameter: 49-53 mm | 1.9- 2.1 inches

40mm Objective: Outside diameter: 45.5-48.5 mm | 1.8-1.9 inches

Eyepiece: 41.5-46 mm | 1.6-1.8 inches