1. STURDY MATERIAL: Made of aviation grade aluminum alloy through CNC one piece process, it has the ability of not easy to corrode and drop resistance, and not easy to be deformed.2. FITTING: The filter adapter ring can realize fitting between the filter and the camera, no need to worry about light leakage and ensure the camera works normally.3. SIMPLE INSTALLATION: With standard threaded fixing design, it can be easily installed on the camera, and reliable, not easy to fall off, convenient for users to use.4. STRONG COMPATIBILITY: This adapter ring has strong compatibility, you can mount the 49MM magnetic filters to for GR2 GR3 GR3X, for RX100 camera lenses, and it will not affect the use of the filter effect.5. LIGHTWEIGHT DESIGN: The weight is so light that you can hardly feel its existence, and it will not add too much weight burden when mounted on the camera, easy to carry and use.Specification:Item Type: Filter Adapter RingMaterial: Aluminum AlloyWeight: Approx. 13g / 0.5ozApplicable Cameras: For GR3 GR3X GR2, For RX100Thread: 42MMSupported Extended Filter Size: 49mm / 1.93inFilter Mounting: Magnetic OnlyHow to Use:With the outer up, rotate the adapter clockwise into the camera lens position before installing the other filters. Turn the adapter ring counterclockwise to remove it.Package List:1 xFilter Adapter Ring