GoPro HD HERO 3 Neutral Density Polarized Lens Filter
This is a neutral density filter for your GoPro HERO 3. This filter improves quality performance, tones down daytime bright lighting and reduces glare. GoPro 3 filters work only on GoPro 3 models: Black, Silver & White.
There are two ways to attach this filter. The best way is to use the mini star bit tool to remove the 10 screws from your housing and insert this filter between the actual lens front & the glass -or- you can simply attach the filter to the outside of the housing with clear tape on the edges. Because the filter is larger than the opening, the tape will not be visible.