Features: 1. Optical Glass Lens, Clear Imaging; 2. Multi-Layer Coating Process, Lens Oil-Proof, And Anti-Scratch; 3. Aluminum Alloy Frame, Strong And Corrosion-Resistant; 4. Adjustable Filters To Meet Different Scenes; 5. Snap-On Loading And Unloading Design, Fast And Convenient,This Filter Can Only Be Used In The Mavic3 Classic Edition Description: Coating Instructions:Nano Coating Photo Filter Effect Type :Neutral Density Type: B: ND32- Size: 3.7 x 3.5 x 0.4cm Material: Aluminum optical glass colour: black Package Contents: 1 x Outer Box 1 x Magnetic Absorption Nanobox 1 x Filter 1 x Lens Cloth 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.