Function: 1 CPL filters can remove non-metallic reflections and restore the original color of the subject. 2. Reduces ghosting during use and makes image more vivid and bright. 3 Made of high quality material, hardened and super waterproof, with an oleophobic coating. 4 No gaps in connection for a secure and quick installation without damage. 5 The lens protector replacement filter designed for Hero 9 motion camera provides better shooting effect. Specifications: a> Item Type: CPL Lens Filter Material: Aluminum Alloy Product Color: Black Product Weight: Approx. 17g / 0.6oz Applicable Model: For Hero9 Motion Camera Package List: 1 x CPL Lens Filter