1、Main Features: The CPL lens filter has the features of waterproof, antifouling, oleophobic and hydrophobic, and the coating dredge layer on the surface of the filter is easy to clean. 2、Anti Scratch and Wear Resistant: The toughened layer of the filter effectively prevents the mirror surface from scratching, and has the characteristics of scratch and abrasion resistance. 3、Silicone Protective Ring: The inside of the adapter frame is equipped with a flexible silicone protective ring, which can protect the camera lens from damage. 4、CPL Lens Filter: The CPL lens filter is a commonly used filter, which can effectively eliminate unnecessary reflections, and can eliminate most of the reflections on non metal non spherical surfaces. It is generally used for landscape photography. When shooting the sky, the sky is bluer. When shooting the water surface, the reflection of the water surface is eliminated, and the scene under the water surface is shot to make the whole picture clearer and more transparent. 5、Applicable Models: Specifically designed for HERO 9, 10 action camera, the Circular Polarizer Lens Filter can effectively improve the shooting effect and meet your requirements. 1 x CPL Lens Filter (adapter ring + filter + filter cover) Item Type: CPL Lens FilterModel: CPLMaterial: Aluminum Alloy + GlassProduct Color: As Pictures Shown Filter Diameter: Approx. 52mm / 2.0inFilter Thickness: Approx. 18mm / 0.7inProduct Weight: Approx. 36g / 1.3oz Applicable Models: Suitable for HERO 9, for HERO 10 Action Camera