SANDMARC Aqua Dive Filter for GoPro Hero 4 & 3+ Red, Magenta & Yellow
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
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
PROFESSIONAL UNDERWATER FILTERS FOR GOPRO - FLIP FILTERS
Glass ND filter for GoPro Session 4/5 – Camera Butter
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
Glass ND filter for GoPro Hero 5/6/7 – Camera Butter
Amazon.com : SOONSUN 4-Pack Lens Filter CPL ND8 ND16 ND32 Filter for GoPro Hero 5 6 7 Black, Neutral Density and Circular Polarizing Lens Filter Kit Lens Protector for GoPro Hero 5 6 7 Black Camera : Electronics
GOPRO NEUTRAL DENSITY FILTER – HERO4 / 3+ – iSOFT
Diving Lens Filter Kit for GoPro Hero 4 and 3+ - Waterproof Housing – CamKix
Freewell 4K Series Standard Day Filter Set for GoPro FW-H9B-STD
NEEWER 4 Packs ND/CPL Filter Set For GoPro Hero 11/10/9 - NEEWER – neewer.com
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