1. Double-sided multi-layer coating, reducing the light reflection between the lenses, clear imaging, better picture quality2. The frame has a built-in rubber ring, effectively isolate the water droplets and water vapor, allowing you to create underwater, in the rain, humidity, low temperature and other environments without worries3. Adopt the same fixing method with the original lens, use the matching wrench to unscrew the original protective lens, then screw to install filter, waterproof, anti-fog, drop-proof performance can be guaranteed to the greatest extent4. 1.5mm thick glass lens, cuts, falls, collision, high water pressure are fearless5. Does not block the host lens field of view, shooting screen transparent without dark corners6. The main role of the ND filter is to reduce the amount of light into the lens, so that the screen to reduce overexposure, lengthening the exposure time of the camera7. CPL mirror can eliminate reflections on the surface of the object, so that the object in the bright environment to restore the original clarity, texture and color saturation8. Material: ABS + glass9. Single filter weight: about 8g10. Size: about 35.3 x 35.3 x 7.2mm11. Description: only the filter, does not include other items in the pictureSpecification: General Compatible with Insta360: Ace Pro Package Weight One Package Weight 0.08kgs / 0.18lb One Package Size 8cm * 6cm * 3cm / 3.15inch * 2.36inch * 1.18inch Qty per Carton 300 Carton Weight 23.70kgs / 52.25lb Carton Size 50cm * 34cm * 32cm / 19.69inch * 13.39inch * 12.6inch Loading Container 20GP: 490 cartons * 300 pcs = 147000 pcs40HQ: 1137 cartons * 300 pcs = 341100 pcs