Features: brand new and high quality Optical glass, precisions grinding and polishing, visible light transmission rate of 96%, high-definition imaging. Adopt double-sided multilayer nano-coating technology to give the lens high-quality waterproof, oil-proof and scratch-proof performances. The frame is made of aviation aluminum, which has strong corrosion resistances and is not easy to fade. Pasted the installation base, stable, no-glue, no need to disassemble and replace the filter element, which is convenient and quick. Can elimanate reflection, increase saturation, enhances contrast, making the pictures more three-dimensional and transparent, preventing overexposure. Specifications: Material: Aluminum alloy (frame) + optical glass Type:4/6/ND4/ND64PL/ND32PL/ND16PL/ND8PL/CPL/UV Applicable models: For Mini 3 Pro Color: Black Net weight: 0.8g Size: Approx.2.15x1.64x0.39cm/0.84x0.64x0.15 inches Package Includes: 3 Package Optional: Package 1 Include: 4x Lens Filters Package 2 Include: 6x Lens Filters Package 3 Include: 1x Lens Filter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.