?Features:The amazing novelty for Gorpo Hero3+/Hero3.This filter can limit the reflection from non-metal surface， such as water and glass windows.Using the filter， the color shall become brighter and clearer and the contrast shall be strengthened.Note: There may be a black circle in your photos when you use with this filter; it is a normal phenomenon.Specifications:Compatibility: for GoPro Hero3 / Hero3+Lens diameter: 37mmMaterial: Optical glass， plastic， aluminum alloyAnti-shake: NoViewing angle: 135-170°Focal distance: 0cmItem weight: 19g / 0.7ozPackage size: 11 * 10 * 1.5cm / 4.3 * 3.9 * 0.6inPackage weight: 31g / 1.1ozPackage List:1 * 37mm CPL Filter1 * Filter Adapter1 * Lens Protective Cap(Cameras are not included)