Features: Optical glass, precision grinding and polishing, high-definition imaging Multi-layer nano-coating process, giving the lens high quality waterproof, oil-proof, dirt-proof, anti-scratch performance Aircraft aluminum frame material, logo by laser laser engraving does not fade, dark gray frame to prevent light leakage ghost shadow Anti-slip gear design, knurled pattern on the top and bottom of the frame, easy to install and remove Installation will not damage the original lens, replace the filter at any time, so that you do not miss the wonderful moment The lens is made by nano-coating process, the color presented by the lens in the sunlight and light is different Specification: Material: Aluminium (Frame) + Optical Glass Color: Deep Gray Types (Optional): UV, CPL, ND8, ND16, ND32, ND64, ND8/16/32/64 Four-piece Set, (ND8/16/32/64) PL Four-piece Set, UV + CPL + ND8/16/32/64 Six-piece Set Size: 3.2x3.2x0.3cm Applicable Model: for DJI Osmo Action 3 Quantity: 1 PCS Package: 1x Filter Cleaning Instructions: If the lenses are contaminated with dust, water droplets or other contaminants, whether or not they have been eliminated, please keep in mind the following instructions for use: first blow off the dust from the surface of the lenses clean again with a clean brush wipe gently with the filter cleaning cloth delivered use a special lens cleaning solution for better results put it in the special storage box when not in use Note: Does not include sports cameras, selfie sticks, adapter bases, bike mounts. Transition: 1cm=10mm=0.39inch As the size and weight are manually measured, due to different measurement methods may lead to a certain error in the weight and size of the product, but the error does not affect the normal use of the product, please confirm that you are aware of and accept the error before purchase. Due to different shooting lights, and differences between monitors, the picture may not reflect the actual color of the object, please make sure you don't mind before ordering, thank you! Only UV filters can transmit 98.5% of light, CPL/ND filters cannot be expressed in terms of light transmission. Lenses will show different colors under the angle of light, and ultimately prevail in kind. single pack packaging for ordinary plastic box packaging, non-magnetic box packaging. Installation and disassembly will touch the lens and leave fingerprints, use a cleaning cloth to wipe the lens.