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- Due to different batches, there may be differences in product appearance, color, and printed text, which not affect us Color: As Shown Material: CNC+Optical Glass Package Contents: 1 x ND8 Filter 1 x ND16 Filter 1 x ND32 Filter 1 x ND64 Filter Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.