PolarPro Red Filter for GoPro Hero3 / Hero3+ / Hero4 60m Dive Housing
GoPro Accessories: Neutral Density, Polarizer & Macro Filters for HERO4 Black & Silver
Amazon.com: CamKix Diving Lens Filter Kit Compatible with GoPro Hero 4, Hero+, Hero and 3+ - fits Standard Waterproof Housing - Enhances Colors for Underwater Video and Photography - Includes 5 Filters : Arts, Crafts & Sewing
FLIP7 One Filter Kit with DIVE Filter for GoPro 3, 3+, 4, 5, 6, 7
SANDMARC Aqua Dive Filter for GoPro Hero 7, 6 & 5 Super Suit - Red, Magenta & Yellow
Amazon.com : CamKix Cinematic Filter Pack Compatible with GoPro Hero 4 and 3+ Includes 4 Neutral Density Filters (ND2/ND4/ND8/ND16), a UV Filter and a Cleaning Cloth. : Electronics