1Applicable Model: The ND neutral density and CPL circular polarizer lens filter kit is suitable for 9 10 11 action camera. 2ND Filter: ND filter can reduce the amount of light input, reduce the shutter speed, and prevent overexposure. It adopts a coating dimming process, almost without color deviation. 3CPL Filter: CPL filter can eliminate harmful reflections, improve image clarity, and increase color saturation, such as blue sky, white clouds, etc. It can liminate reflection from glass or water surface. 4Multi Layer Nano Coating: Adopting a multi layer nano coating process, the lens is endowed with waterproof, oil resistant, stain resistant, and scratch resistant performance, providing protection for your lens. 5Anti Slip Gear Design: The filter frame has knurled patterns on the top and bottom, making it easy to install and disassemble. During installation, the original lens will not be damaged, and the filter can be replaced at any time to prevent you from missing out on exciting moments. After installing the filter, it will not affect the installation and use of the waterproof shell. 6Ultra Light Frame: Made of aviation aluminum frame material, it has no impact on shooting, is tight, durable, and has a long service life. The black matte surface frame prevents light leakage and ghosting. Optical glass lens, precise grinding and polishing, high definition imaging4 x Filter 1 x Storage Box 1 x Wiping Cloth