Product name:ND/CPL/UV Lens Filter With Multi-Layer Coatings Compatible For GO2 / GO3 Action Camera Lens Accessories .LENS MATERIAL: Optical glass, precision grinding and polishing, high-definition imaging. Adopting double-sided multi-layer coating process to restore true colors. PREMIUM PERFORMANCE: Double sided waterproof and oil resistant, providing protection for your lens. FRAME DESIGN: The aviation aluminum frame material, the sign is ray-light engraved and fadeless, and the dark gray frame prevents light leakage and shadows. CPL: The CPL is adjustable, and the light can be adjusted by rotating the gear to select the appropriate luminosity for shooting CUSTOMER SERVICE: Our mission is providing the great customer service to satisfy our customers. Thus, if any issues regarding this product, please feel free to contact US. .Description: Product Name: Filter Kit Applicable models: compatible for GO2 / GO3 Main material: aluminum alloy (mirror frame)+optical glass Color: Dark Gray Product size: 1.8 x 1.8 x 0.3cm (UV/ND), 1.8 x 1.8 x 0.4cm (CPL) Precautions: 1. Only UV filters can transmit light by 98.5%, while CPL/ND-PL filters cannot be represented by transmittance; 2. Only CPL filters can be adjusted, and other filters cannot be adjusted; 3. The filter is only compatible for GO2 / GO3, 4. CPL filters are not waterproof, ND/UV waterproof, please pay attention before purchasing. Packing list: Filter x 1