Item Type: NDPL Filter Material: Aluminum Alloy, Optical Glass Applicable Models:For Mini 3 Pro 1Multiple Functions: This filter combines the advantages of ND filter and PL polarizer to prevent overexposure, block scattered light, reduce shutter speed, extend exposure time, eliminate reflections, and increase saturation. 2High Transmittance: The lens adopts optical glass, high definition grinding treatment, high transmittance. 3Nano Technology: Cameras lens filter adopts double sided multi layer nano coating technology, and the lens is waterproof, oil proof, stain proof and scratch proof. 4Advanced Technology: Cameras lens filter adopts coating light reduction process, almost no color cast,and includes 4 specifications, ND8 PL, ND16 PL, ND32, PL, ND64 PL. 5Small Portable: NDPL filter is compact and easy to carry, with a storage box, which can be placed in a pocket and carried in a backpack. 1 x ND8 PL Filter 1 x ND16 PL Filter 1 x ND32 PL Filter 1 x ND64 PL Filter 1 x Storage Box