1、Compatibility: Specifically designed for Action 3 4 camera, providing more creative space for photography, capturing beautiful scenery in clear detail. 2、ND PL Filter Set: By using ND PL filter, you can simultaneously reduce exposure levels and eliminate non‑metallic reflections. This filter combines the advantages of both filters, making it a powerful tool for landscape photography. 3、High Definition Coating: The filter adopts high definition coating technology, offering better clarity. The anti scratch coating design prevents scratching on the surface and has an oil repellent layer to prevent oil. 4、Convenient Portability: The ultra thin metal design reduces weight, and the included storage box allows you to easily carry and store the filters in your pocket or backpack. 5、Complete Set: The kit includes 4 different ND PL filters, 1 blue streak filter and 1 CPL filter, allowing you to freely choose according to your needs and meet the demands of different shooting situations. Item Type: ND PL Filters Set Material: Aluminium Alloy, Optical Glass Weight: Approx. 120g / 4.2oz Compatible Model: for Action 3 4 Camera 6 x Filters 1 x Storage Box