100% brand new and high quality 4pcs colorful diving filters(red, yellow, purple, gray), provides colorful unique diving photography, interesting and beautiful, specially designed diving filter can improve the photography quality efficiently, suitable for different underwater environment Suitable for GoPro Hero 4/3+ sports camera Suitable for the depth of 3-20m/12-65ft Snap-on design, convenient to install and use, straightly installed on the sports camera waterproof case, no effect on the normal usage of camera function Usage Method: Red: used in the tropical water at the depth of 10-20m at noon Yellow: used in the tropical water in the morning or shallow water(10m) Purple: used in the green water, fresh water like lakes and streams, or in dusk time Gray: used to remove unwanted reflections from non-metallic surface, such as gla or water Item Type: Underwater Diving Filter Material: Acrylic Shape: Square Weight: 18g/Piece Suitable Type: for GoPro Hero 4/3+ Sports Camera Waterproof Case