【Applicable Models】 This tri-color dive filter is only compatible with the official GoPro Hero 13/12/11/10/9 black waterproof housing and the FiTSTILL Hero 13/12/11/10/9 special aluminum alloy waterproof black housing. (Note: This filter cannot be used directly with camera lenses, third-party housings, or other housing models. Please purchase a compatible housing according to your needs.) 【Function Description】 This dive filter includes red, pink, and purple filters. The red filter is suitable for scuba diving at depths of approximately 3.7–4.6 meters and provides color correction in blue or tropical water. The light red filter is suitable for snorkeling at depths of approximately 6–4.6 meters and provides color correction in blue or clear freshwater. The magenta filter is ideal for green waters such as freshwater lakes and reservoirs. Optimal results are achieved at depths of approximately 2.4 to 23 meters. 【Safety lanyard included】 You can easily attach/remove the filter from the Super Suit housing. Loop the lanyard around the filter and secure it to the housing to prevent loss. 【Made of high-quality materials】 These dive filters are made of highly light-transmitting acrylic resin, allowing you to capture high-resolution underwater photos and videos. 【Product list】 1 x red filter, 1 x pink filter, 1 x purple filter, 3 x safety lanyards.