【Precision CNC-Machined Aluminum Alloy Frame】The filter frame is crafted from high-quality aluminum alloy using CNC precision machining, ensuring a lightweight yet durable construction. This robust design provides a secure fit for your camera 【German Imported Optical Glass Lens】Equipped with premium German optical glass, this filter delivers exceptional clarity. The advanced lens grinding technology enhances both the physical and chemical properties of the glass, resulting in clearer images for professional-quality results 【Multi-Layer Coating for Enhanced Clarity】Featuring multi-layer coatings, the filter offers high transparency and brightness, preserving the true colors of your shots. This ensures more vibrant and lifelike photos, capturing every detail with precision 【Waterproof, Oil-Proof, and Scratch-Resistant】Built to withstand tough conditions, this filter is coated to be waterproof, oil-resistant, and scratch-proof, providing effective protection for the lens. It's perfect for outdoor photography, ensuring long-lasting durability 【Adjustable Design】The CPL filter is adjustable. When shooting, you can rotate the black lens ring as needed to achieve the desired polarization Specifications: Applicable models: for DJI Osmo Action 5 Pro/4/3 Material: Aluminum alloy + optical glass