Double-sided nano-coating protects the lens while ensuring clarity, and the effect is clear and delicate Using CNC technology, the structure is more solid and , suitable for a variety of outdoor environments Oleophobic and waterproof, scratch-, water into beads, easy to clean, scratch-, no marks Threaded design, one turn and it is stable. The filter adopts a threaded design for quick installation and removal Aviation-grade aluminum alloy frame, which not add burden to the camera Name:Action camera filter Applicable models:for Action 4 The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:Optical glass + aluminum alloy Package Contents: 1 * Nd8 Filter 1 * Nd16 Filter 1 * Nd32 Filter 1 * CPL 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.