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

Outside Diameter (inches) 1.89 - 2.08 inches
Outside Diameter (mm) 48-53 mm