1.1. Shell material imported acrylic 'plexiglass', selected raw materials, professional manufacturing, rigorous testing, suitable for various environments such as ice and snow or deep-sea snorkeling. 2.2. High-quality glass as a waterproof shell lens, AF, AR double optical coating. The lens has high light transmittance, is easy to clean and scratch-resistant. It can highly reduce natural light and color whether for underwater shooting or daily protection. 3.3. aircraft screw configuration, making operation easier compared to the past. 4.4. Full body waterproof, protecting your camera from water, and perfectly fitting for Hero 5 Black Action Camera. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia