【Compatibility】Go Pro Hero 13 12 11 10 9 Black Official Waterproof Case.(NOTE: Only for FiTSTILL Hero 13/12/11/10/9 Black Aluminum Alloy Case.It can't be used on camera lens directly.Does not fit for 3rd party housing case.)【Function Introduction】It includes red, light red and magenta filter. RED FILTER can be used to scuba diving at the depth of 12-85 feet and color correction in blue water or tropical seawater; LIGHT RED FILTER can be used to snorkel at depth of 2-15 feet and color correction in blue water or clear freshwater; MAGENTA FILTER is a good choice for green water such as fresh water lakes and reservoirs. It will yield the best results from 8 to 75 feet.【Come with Safety Tether】You can snap on/off the filters to the super suit housing case easily.Please loop the tether to the filter and attach it to the housing to avoid loss.【Made of High Quality Materials】These dive filters are made of high transmission acrylic which help you capture high-definition photos and videos underwater. 【Made of High Quality Materials】These dive filters are made of high transmission acrylic which help you capture high-definition photos and videos underwater.