Feature 1、Exquisite Workmanship: Optical glass, precise grinding and polishing, high definition imaging. Aviation aluminum frame material, dark gray frame to prevent light leakage and ghosting. 2、Multilayer Nano Coating Process: The ND filter adopts a multilayer nano coating process, endowing the lens with waterproof, oil resistant, stain resistant, and scratch resistant performance. 3、Anti Slip Gears: The ND8 ND16 ND32 ND64 filter is designed with anti slip gears, and the frame is equipped with knurled patterns above and below, making it easy to install and disassemble. 4、Install and Replace: 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. 5、Coating Process Lens: The lenses are made by a nano coating process, and the colors presented by the lenses vary under sunlight and light. Item Type: ND8 ND16 ND32 ND64 Filter Set for DJI Osmo Action 4 Material: Aluminum Alloy, Optical Glass Weight: Approx. 68g / 2.4oz Package List 1 x ND8 Filter 1 x ND16 Filter 1 x ND32 Filter 1 x ND64 Filter 1 x Storage Box 1 x Cleaning Cloth