3 IN 1 : CPL ND8 ND16 4 IN 1: CPL ND8 ND16 ND32 4 IN 1 ND: ND8 ND16 ND32 ND64 6 IN 1: UV CPL ND8 ND16 ND32 ND64 Product features A : Waterproof Filter Product features B : oil resistant Filter Product features C : stain resistant Filter Product features D : scratch resistant Filter Product features E : Prevent light leakage Product features H : Ultra-light Filter Frame material : Aluminium Alloy Frame Filter material : HD Optical glass Cleaning instructions: If the lens is contaminated with dust, water droplets, or other pollutants, whether or not they have been removed, please remember the following usage methods. 1. First blow off the dust on the surface of the lens; 2. Clean again with a clean brush; 3. Gently wipe with the delivered filter cleaning cloth; 4. The use of specialized lens cleaning solution has a more ideal effect; 5. Store it in a dedicated storage box when not in use. Feature: 1. Applicable Model: This filter is suitable for DJI O3 Air Unit. A magnetic absorption nano box specially designed for the set of filters, equipped with a soft sponge inside the box, to fix the filter and prevent it from falling off, making it portable for long-distance travel. 2. High-definition Grinding Treatment: The filter is made of SCHOTT optical glass, with high-definition grinding treatment. 3. Multi-layer Nano-coating Process: Multi-layer nano-coating process, the filter is waterproof, oil-proof, anti-fouling, and scratch-resistant. 4. Quick Installation: Non-destructive quick installation for quick filter replacement. The filter is equipped with clips on the top, bottom, left, and right sides, making it easy to install and not easy to fall off during flight