Feature: 1. 【Square CPL Filter】CPL Filter allows you to remove unwanted reflections from non-metallic surfaces such as water, et. It also enables colors to become more saturated and appear clearer with better contrast. 2. 【Premium Quality】Made of premium optical, high light transmittance can effectively improve image clarity to get desired high quality image and effect. 3. 【Super Slim】With super thin aluminum alloy frame, and thickness about only 5.5mm, the CPL filter effectively avoids vignetting on wide angle lenses. 4. 【Wear-resistant】Double sided 18-layer super multi-coating with waterproof, anti-oil function and high grade hardness for anti-scratching, long service life. 5. 【Wide Application】The filter can fit all models lens at right diameter and is able to be compatible with GoPro Hero11 Black/ Hero 11 MINI/ 10 Black/9 Lens. Specification: Specifications: Main Material: Optical + aluminum alloy Item Size: 32 * 32mm/ 1.2 * 1.2in Thickness: 5.5mm/ 0.2in . Package List: 1 * Lens Filter