BiG DIGITAL Red filter for Scuba Tropical Water, Purple filter for Green Color Water, Pink filter for Warming Effect Gray filter, for Neutral Density Effect - Compatible with GoPro Hero3 Black, Silver, White, Surf, Edition Color Correction For Tropical and Blue Water Scuba Diving, Dramatically improves underwater colors, Snap On Design Easy to Atttach and Remove The Scuba tropical filter dramatically improves underwater colors, The Green Color Water Correction filter improves the color of green water to give your subject a rich natural tone, The Warming filter changes color temperature, The Neutral Density Filter Slows down shutter speed for motion blur effect Great for snorkeling, scuba diving, surfing, wake-boarding and any other deep water activity. The Filter snaps onto the GoPro Hero3 waterproof housing only.