Feature: 1. APPLICABLE MODEL: This lens filter is suitable for Hero11 Black, for HERO10 Black and for HERO9 Black and has a long service life. 2. LIGHT REDUCTION: The purpose of this ND light reduction lens is to reduce the amount of light entering the camera, resulting in more exposure options. 3. PROTECTION LENS: ND lens filter and UV lenses also ensure the safety of camera lens and have a certain role in dust protection. 4. 52MM SPECIFICATION: All ring shaped 52mm camera lens filters that can be mounted on a sports camera adapter. 5. FAST INSTALLATION: Our camera filters are quick and easy to install and remove, compact and easy to carry, and have a long service life. Specification: Item Type: Variable ND Lens Filter Set Material: ABS, optical glass Applicable Model: For Hero11 Black, for HERO10 Black and for HERO9 Black. Package List: 1 x Adaptor Ring(Installed)1 x ND Filter1 x UV Filter1 x Lens Cover(Installed)1 x Hex Wrench1 x Storage Box