FLIP CAP OPTIC COVER - SIZE 540 - 46 mm
1.6 - 1.8 inches
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):