Vortex Size 6 Flip Cap Optic Cover FC-6

The hinged flip cap optic cover makes it a snap to keep fine optics protected and flips completely back so the cap lies flat. Simply slip the rubber cover over the objective or ocular end of your optic.Size 5 fits over a variety of optics with these outside diameters (OD): 40-55 mm 1.8–2.2 inches