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 4 fits over a variety of optics with these outside diameters:

• 35-40 mm
• 1.4–1.6 inches

Size 5 fits over a variety of optics with these outside diameters:

• 40-46 mm
• 1.6–1.8 inches

Size 6 fits over a variety of optics with these outside diameters:

• 46-55 mm
• 1.8–2.2 inches

Size 7 fits over a variety of optics with these outside diameters:

• 55-61 mm
• 2.2–2.4 inches