1. optical glass, precision grinding and polishing, high-definition imaging 2. multi-layer nano-coating process, giving the lens high-quality waterproof, oil-proof, dirt-proof, scratch-proof performance 3. Aviation aluminum frame material, logo engraved by laser engraving will not fade, black matte surface frame, to prevent light leakage and ghosting 4. Lens cover can be installed without removing the filters to protect the filters from damage Cautions:Only UV filters can transmit 98.5% of light; CPL filters cannot be expressed in terms of light transmission Type:A:UV+CPL+ND16 Colour:As Shown Material:Aluminum + optical glass Package Contents: 1 * Drone Filter kit 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.