1. Optical glass, precision ground and polished, high-definition imaging; 2. Utilizes a multi-layer nano-coating process, giving the lenses superior waterproof, oil-, dirt-, and scratch- properties; 3. Made of aviation-grade aluminum frame material, the logo is laser-etched and does not fade; 4. Anti-slip gear design with embossed patterns on the top and bottom of the frame for easy installation and removal;Installation not damage the original lenses; interchangeable filters allow you to capture every exciting moment without missing out; 5. The lenses are made using nano-coating technology; they appear differently in sunlight or artificial light. Applicable models: for Action 3/ Action 4/ Action 5 Pro Product size:1.25x1.25x0.19inch(3.2x3.2x0.5cm). Colour:As Shown Material:Aluminum + Optical Glass Package Contents: 6 * Lens Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.