Feature: 1. Made of high quality optical glass, which is high‑definition grinding treatment without affecting the image definition. 2. Adopts multi‑layer nanometer coating process, with waterproof, oil‑proof, anti‑fouling and anti‑scratch properties. 3. The filter fits the body lens perfectly, which is harmonious and beautiful. 4. The filter frame is made of high‑quality aviation aluminum material. Real machine opening mould, fast disassembly design and fast installation. 5. ND filter is used to reduce the amount of light into the camera to choose the correct exposure value, to prevent excessive exposure. The use of coating light reducing process, to avoid the traditional ND filter color bias, almost colorless bias. 6. The number after ND, which represents the ND filter's ability to block light, and with PL polarized composite function, eliminate harmful polarized light. Specification: Condition: 100% Brand New Item Type: ND Filter Material: Aluminum Alloy + Optical Glass Color: Black Product Size: Approx. 3x3x0.85 cm/1.2x1.2x0.3 in Weight: Approx. 28.0gApplicable models: Suitable for DJI OSMO ACTION Camera . Package List: 1 x ND Filter Note: 1. The delivery without motion camera and frame.2. Please allow 1‑3cm error due to manual measurement. Thanks for your understan3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.