Features: Lens Filter set specially for action camera 52mm Filter Adapter ; Aluminium adapter for durability; lightweight and portable; Can be directly installed on the camera lens; easy to install and remove; the locking screw secures the adapter for added stability; The adapter with internal thread diameter of 52mm; installing a filter provides protections for the camera lens; Can adapt filters with outer diameter of 52mm filters, offering more possibilities for various photographic creations; Specifications: Item：Lens Filter set Size about 5.4x5.4cm/2.1x2.1in Adapter Inner Diameter：52mm/2.05in Filter adapter For 2 Package Includes: 1PC Lens Cover 1PC adapter note: When installing this filter adapter, you must first remove the rubber decorative protections on the camera lens; The filter adapter will partially block the microphone windshield in the lower right corner and will not affect the camera function; Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.