Underwater Floating Dive Diving Red Yellow Purple Flip-up Filter For Gopro Hero 4 Housing Case Photography Color Correction Accessories with Aluminum Alloy FrameFeature:* Various colors are available， yellow， red and purple. Red Filter: use in water depth of 10-20 meters， around noon (sunlight water) can be used red， the main purpose is to restore the water to be absorbed red and to leave you with natural colors. Yellow Filter: use in Tropical waters in the morning， shallow water， use in blue water. Purple Filter: eliminates the green light reflection.* Made of aluminum alloy， CNC machining， anodizing， abrasion resistance， can be soaked in seawater; Good in material， and superb in workmanship makes it match very well the waterproof housing without causing scratches. * Flip up design allows users to quickly add or remove the filter for land and water use or as color drops off with depth， conveniently between using filters or not converted to use.* Perfect for Scuba Diving， Underwater photography， Aerial PhotographyPackage Content:1* Red Filter with Aluminum Alloy Frame1* Yellow Filter 1* Purple Filter 1* Hexagonal Wrench