Features: Optical glass, precision grinding and polishing, highly definition imaging. Adopting double-sided multilayer coating technology to restore real color. Double sided oil repellentation and waterproof, providing protections for your camera lens. Made of aviation aluminum frame material, clear engraved and not easy to fade. CPL/NDPL is adjustable, and the light can be adjusted by rotating the gear to select the appropriate brightness for shooting. During installation, original lens will not be damaged, and the filter can be replaced at any time to prevent you from missing out on exciting moment. Specifications: Material: Optical Glass+Aluminum Alloy Type: UV, CPL, ND8, ND16, ND32, ND64, 3pcs/set UV+CPL+ND16, 4pcs/set ND8/16/32/64, 6pcs/set UV/CPL/ND8/16/32/64, 6pcs/set CPL+ND8PL+ND16PL+ND32PL+ND64PL+ND128PL(optional) Applicable Model: for Mini 4 Pro UV/ND8/16/32/64: Approx. 2.2x1.8x0.3cm/0.86x0.70x0.11" CPL/NDPL: Approx. 2.2x1.8x0.4cm/0.86x0.70x0.15" Package Includes: 1x or 1 Set Lens Filter note: 1. Only UV filters can transmit 98.5% of the light, while CPL filters cannot be represented by transmittance; 2. Only CPL/NDPL filters can be adjusted, and other filters cannot be adjusted.