Features: brand new and high quality Suitable for Hero11 Black/Hero10 Black/Hero9 Black. The function of the ND filter is mainly to reduce the amount of light entering the camera and bring more exposure option. Installation and disassembly, quick and convenient. The ND filter and UV filter also protect the camera lens, which has a certain dust-proof effect. All ring 52mm camera lens filters, can be installed on the action camera adapter. Specifications: Adapter ring material: Aluminum alloy Interface size: 52mm/2inches ND frame material: Aluminum ND lens material: Optical glass, polarizing film Adjustable ranges of ND mirror: ND2-ND400 Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Adapter ring 1x ND filter 1x UV filter 1x Lens caps 1x Wrench