Feature:1. COMPATIBLE MODELS: ND and polarizer filter kit, compatible with for DJI Osmo Action 4. HD glass ensures crisp, clear imaging during high strength outdoor sports photography. It's perfect for surfing, snorkeling, kayaking, skiing, mountain biking, skydiving, skateboarding, and a host of other sports!2. ADJUSTABLE LIGHT LEVELS: ND8, ND16, and ND32 sports camera filters with 3, 4, and 5 levels of light reduction, respectively, provide precise exposure control during dynamic outdoor activities. They can effectively prevent overexposure and improve image quality under various sunlight conditions. ND or PL is adjustable, and the light can be adjusted by rotating the gear to choose the right luminosity for shooting.3. VIVID COLOR REPRODUCTION: Bring your sports footage or travel video blog to life with the included CPL filter. It helps reduce flare and reflections from non metallic surfaces such as water, glass, and windows, enhancing colors and boosting contrast for sharper, more attractive footage!4. DUAL SIDED MULTI LAYER NANO COATING: With 30 layers of multi functional nano coating on both sides of the HD optical glass, these filters are water, scratch and oil resistant.5. LIGHTWEIGHT AND ULTRA THIN: These lightweight filters are made with meticulous CNC craftsmanship and ultra thin aluminum frames that weigh only 0.15oz or 4.3g each. They fit seamlessly into the lens for fluent mounting and dismounting, and their sturdy construction ensures stability even during strenuous movement.Specification:Item Type: ND FiltersProduct Material: Aluminum Alloy, GlassFilter Model: CPL, ND8, ND16, ND32Compatibility: for DJI Osmo Action 4 Light Transmission: 99.6 percent ND8: Reduces Light By 3 Levels, Ideal for Bright Sunlight Conditions.ND16: Reduces Light By 4 Levels, Ideal for Moderately Bright Sunlight ConditionsND32: Reduces Light By 5 Levels, Ideal for Bright Sunlight ConditionsCPL: Reduces Reflections From Non Metallic Surfaces, Enhances Color and Improves Contrast.Package List:4 x ND Filters