1、The lens frame is made of aero‑grade aluminum alloy with CNC precise machining and anodized surfaces treatment. With high definition optical glass production, strong and durable in use. 2、Using 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. 3、Star filter takes the luminous point as the center, the luminous effect is formed after the diffraction effect of light. This is a kind of stage shooting or night shooting effect filter, can play an extraordinary role in the picture. 4、CPL 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. 5、Night filter can effectively reduce light pollution and make the picture show real color, selecting optical glass material strictly to meet the high‑definition picture quality. 6、Designed for GOPRO HERO9 motion camera, the lens protective cover replacement filter gives you better night shooting effect. Condition: 100% Brand New Item Type: Camera Filter Set Material: Lightweight Aluminum + Optical Glass Color: Black Product Size: Approx. 32x32x5 mm/1.3x1.3x0.2 inWeight: Approx. 126.0g 1 x STAR Filter 1 x CPL Filter 1 x ND8 Filter 1 x ND16 Filter 1 x ND32 Filter 1 x NIGHT Filter 1 x Storage Box