BiG DIGITAL Red, Magenta, Yellow, Grey (for Neutral Density Effect) filters (4 Pack) for GoPro HERO4, HERO3+ HERO 3+, 3 Plus Camera Compatible w/Standard Housing Only It will NOT fit hero 3+ lcd touch bacpac or Dive housing, it will only fit Standard Housing The Red Dive Filter: is a color correction filter designed to remove cyan color cast while using the camera in blue-biased waters, and is ideal for use in blue salt water or clear fresh water at depths between 15 and 70'. Dive sites where one might use this filter include sunny, tropical locations such as the Bahamas, Cayman Islands, and Hawaii. The Magenta Filter is designed for color correction while scuba diving in green water. The Yellow filter is great for night activity The Neutral Density Filter Slows down shutter speed for motion blur effect