Feature: 1. Optical Glass: The ND8 ND16 ND32 ND64 lens filter adopts optical glass, with high definition sharpness and high definition imaging, meeting the needs of professional photographers. 2. Aviation Aluminum Frame: The ND filter set is made of aviation aluminum frame material, with a dark gray frame to prevent light leakage and ghost shadows. 3. Double Sided Coating: The ND8 ND16 ND32 ND64 lens filter adopts a double sided multi‑layer nano coating process to restore true colors. 4. Waterproof and Oil Resistant: ND filters set for Insta360 GO2 is double sided waterproof and oil resistant, providing protection for your lens. 5. Knurled Patterns: The two sides of the ND filter set for Insta360 GO3 are set with knurled patterns, making it easy to install and disassemble. 6. Replacement and Installation: During installation, the original lens will not be damaged, and the filter can be replaced at any time to prevent you from missing out on exciting moments. Specification: Item Type: ND8 ND16 ND32 ND64 Lens Filter Product Material: Aluminum Alloy, Optical Glass Weight: Approx. 56g / 2.0oz Application: Suitable For Insta360 GO 2/3 Action Camera. Package List: 4 x Filter 1 x Storage Box 1 x Cleaning Cloth