High-definition professional optical glass with high durability and scratch resistance Multi-layer nano-coating process, clear imaging, meeting high-pixel imaging standards during Using high-quality craftsmanship, the lens is waterproof, oil-proof, and scratch- Aviation aluminum frame material, firmly sealed, , , not affect drone calibration or balance, not fade or rust These filters are perfect for capturing stunning professional-quality in a variety of lighting conditions, helping to reduce glare, increase color saturation and manage exposure. Take your drone photography to level with this essential accessory kit Applicable models:for O4 Air Unit Pro/Avata2 Protection performance: waterproof, oil-proof and scratch- The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:CNC+Optical Glass Package Contents: 1 * ND8 Filter 1 * ND16 Filter 1 * ND32 Filter 1 * ND64 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.