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The JJC 37mm Center Snap-On Lens Cap is a lens cap can be used to replace perfectly the original 37mm DSLR camera lens for Canon, Nikon, Fujifilm, Sony, etc. Be Suitable for the professional technicians. How to Pick the Right Size Lens Cap? The lens cap should be the same size with your camera lens. If you don't know the size of your filter threads, you can find out by looking on the front of your lens for the symbol ? with a number. Specification Model: LC-37 Material: ABS Plastic Size: 37mm Gross Weight: 0.2 ounce Why choose it? The lens cap keeper is attached to the lens cover via the hole of it, but our cap can be used to fit particular lens perfectly and tightly, keeping lens 100% sealed to protect it from dust, moisture, fingerprint, sunlight and so on as original Canon, Nikon lens caps. Features 1. 100% Recycled Plastic 2. Easy to remove, even with lens hoods on 3. Strong springs 4. Tighter fit and longer life Item Including 1. 37mm Center Snap-on Lens Cap x1 (Fits for lens with 37mm filter thread) 2. Extra Free Lens Cap Keeper x1 Warranty 1-year 100% Satisfaction Guarantee The Camera and lens are excluded.