Feature:1. Purple Filter: Correct the color cast under the fluorescent lamp to eliminate the yellow and green reflected light.2. Waterproof and Antifouling: Oleophobic and water repellent, the coating and dredging layer on the surface of the filter is easy to clean.3. Yellow Filter: Suitable for wheat waves, grassland, rape blossoms, etc., brilliant colors, one of the most important filters for photographic art creation.4. Red Filter: Suitable for enhancing the red tones in the picture, making the scene more vivid and layered. It is powerful tool for shooting scenes such as maple leaves, sunsets, sunset clouds, fire clouds or evening desert dunes.5. Protect Lens: The inner side of the adapter frame is equipped with flexible silicone protective ring, which will not damage the camera lens. Anti scratch and anti abrasion, the filter's toughened layer can effectively prevent the mirror from scratching.Specification:Item Type: ND Filter Kit Color: As Pictures ShownWeight: Approx.49g/1.7ozMaterial: Aluminum Alloy + GlassModel: Diving Red, Diving Yellow, Diving PurpleApplicable Models: for Hero 9/10Filter Diameter: Approx. 52mm/2.0in.Package List:1 x ND Filter Kit (Adapter Ring + Diving Red + Diving Yellow + Diving Purple + Filter Cover)