1The lens frame is made of aerograde aluminum alloy with CNC precise machining and anodized surfaces treatment. With high definition optical glass production, strong and durable in use. 2CPL is a common filter, which is generally used for landscape photography to eliminate unnecessary polarized light and make the whole picture clearer and more transparent. 3Using ND filter, more free to controll aperture and shutter, bringing more exposure means and creation space, and effectively preventing overexposure. The number after ND represents the ability of ND mirror to block light. 4UV filters are suitable for coastal, mountainous, snowy and open areas and other environmental shooting. They can reduce the blue color caused by ULTRAVIOLET rays. For the camera at the same time, it can also eliminate the interference of ULTRAVIOLET on CCD, which is helpful to improve the clarity and color restoration effect. 5Designed for GOPRO HERO9 motion camera, the lens protective cover replacement filter gives you better shooting effect. Condition: 100% Brand New Item Type: 5 in 1 CameraFilterSet Material: Lightweight Aluminum + Optical Glass Color: Black Product Size: Approx. 32x32x5 mm/1.3x1.3x0.2 in Weight: Approx. 117.0g 1 x UV Filter 1 x CPL Filter 1 x ND8 Filter 1 x ND16 Filter 1 x ND32 Filter 1 xStorage Box 1. Please allow 13cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.