Fangrui Product Details 1. Jsr Round Housing 3 In 1 Nd8andnd16andnd32 Lens Filter For Gopro Hero8 Black 2. Made Of Metal And High Transparency Glass. 3. Significantly Reduce Lens Flare And Ghosting While Making The Filter Anti-scratch, Reduce Reflection, Water Repellent, Increase Surface Durability, Oil and Dust Resistant. 4. Nd Filter Reduces The Amount Of Light Coming Into The Sensor, Giving You The Freedom To Create Your Own Work By Allowing More Control Of The Camera Shooting, Exposure Time And Sensor Sensitivity Settings.the Numbers In The Back Represent The Dimming Level. 5. Protect Your Expensive Lens From Dust And Scratch While Not Lowing Your Photo Quality. 6. Portable And Durable, Easy To Install. 7. Lightweight, High Transmittance And Low Reflectance. 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.