EelVision Dive Filters for GoPro HERO4 HERO3/3+ (2 pack: Red + Magenta) / Dive Scuba Diving Underwater Color Correction Underwater color correction filter to reduce blue and green tints and restore vibrant colors while diving. Bundle contains two filters, blue and blue-green water (BG) and for green water (GW) It can be installed and removed easily from inside the HERO4 and HERO3/3+ housings. Does not require to remove screws and does not void GoPro's warranty! Compatible with GoPro HERO4 and HERO3/3+ housings (Black, Silver &amp; White) only.