Features: 1. Multi-Layer Coated Filter, High Transparency And High Brightness To Restore 2. Use Professional Optical Glass Lenses To Make Images Clearer And Make Your Works More Professional 3. Aviation Aluminum Frame, Cnc Precision Machining 4. Thread Tightening Installation, Fast And Convenient Disassembly 5. High-Definition And High-Transparency, Effective Protection Product Name: Coated Filter Series Applicable Models: Suitable For Insta360go3/Go2 SET: Set B-ND4+ND8+ND16+ND32 size: 18 x 4mm Material: Aluminum frame + optical glass lens colour: black Package Contents: 1 x ND4 Filter 1 x ND8 Filter 1 x ND16 Filter 1 x ND32 Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.