E-League(TM)GoPro Hero 3+/4 Diving Filter,4 in 1(red & pink & purple & grey)Underwater Lens,Color Lens,Swimming Filters for GoPro Hero 3+/4 Compatile with:GoPro Hero 3+/4. Filters snap on and off easily from your GoPro Hero3+/4 Scuba Housing case. Filters are crafted out of a high optical grade acrylic for maximum sharpness. Warming filter changes color temperature.  Neutral density filter will slow down cameras shutter speed allowing you to creatively blur select moving subjects. Scuba tropical filter dramatically improves underwater colors.  Green Color Water Correction filter improves the color of green water to give your subject a rich, natural tone.