ITEM NAME:3x ND4/8/16 Neutral Density Fader Variable Filter for GOPRO Hero 5 6 Description: Application: to shoot very bright objects such as sun, to use large aperture when light is adequate, and to achieve illusory effects with slow shutter. Support wide angle video/picture shooting without vignetting. Used to filter light and prevent too much light from entering, so as to reduce exposure. Will not affect colors of original objects. Specially designed for GOPRO Hero 5 Hero6 Hero7. Specification: Dimensions: 39 x 40mm/1.5 x 1.6 inch Material: Glass +ABS Functions: provide three different light effects Package Includes: 1 Piece ND4 Filter 1 Piece ND8 Filter 1 Piece ND16 Filter Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you. Please install the item under professional guidance..1 Piece ND4 Filter. Specially designed for GOPRO Hero 5 Hero6 Hero7. Used to filter light and prevent too much light from entering, so as to reduce exposure. 1 Piece ND8 Filter. 1 Piece ND16 Filter.