Item Type: ND Filter Kit Color: As Pictures Shown Weight: Approx.49g/1.7oz Material: Aluminum Alloy + Glass Model: Diving Red, Diving Yellow, Diving Purple Applicable Models: for Hero 9/10 Filter Diameter: Approx. 52mm/2.0in Package List 1 x ND Filter Kit (Adapter Ring + Diving Red + Diving Yellow + Diving Purple + Filter Cover) 1Purple Filter: Correct the color cast under the fluorescent lamp to eliminate the yellow and green reflected light. 2Waterproof and Antifouling: Oleophobic and water repellent, the coating and dredging layer on the surface of the filter is easy to clean. 3Yellow Filter: Suitable for wheat waves, grassland, rape blossoms, etc., brilliant colors, one of the most important filters for photographic art creation. 4Red 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. 5Protect 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.