The patented Optic Cover by Allen protects your optic or non-magnifying optic from dirt, dust, and scratches. It's reversible, with Mossy Oak Infinity camo on one side and black on the other. This cover easily stretches over your optic in seconds and is tight enough that it won't accidentally come off. Great for use in the field or to protect your optic in the safe. Product Features: Fits large size rifle scopes with 44mm to 56mm objectives & up to 15-inches long common magnifications & objective sizes3-9x50, 3-15x44, 3.5-10x50, 4-16x50, 6-24x50, 3-15x52, 4-20x52, 6.5-20x56.