Feature: 1. Multilayer Nano Coating Technology: Lens has waterproof, oil proof, anti fouling, and anti scratch performance, which protects the lens from dust and scratches. 2. ND2‑ND400 Adjustable Filter: 1 to 9 gear neutral density filters, 18 layers of anti light damage coating, effectively reducing color cast and restoring true colors. 3. Using Embossed Lens Frame: Meticulous embossing image, perfect rotation damping, good hand feeling. 4. Necessary Adjustable ND Lens: Reduce the amount of light, reduce the shutter speed, extend the exposure time, use large aperture. 5. Extend Exposure Time: In a brightly lit environment, let the running water and clouds appear "fog like" dynamic feeling. Specification: Item Type: ND Lens Filter Material: Aluminum Alloy + Optical Glass Ring Color: Black Filter Type: Neutral Density Filter Neutral Density Level: 2-400 Main Function: Reduce the Exposure Through the Lens Light. Package List: 1 x ND Filter1 x Storage Box