Amazon.com : LENSKINS MRC ND16 Filter for GoPro Hero 5 Black, Hero 6 Black, Hero 7 Black, AGC Optics Glass, 18-Layer Multi-Resistant Coating Neutral Density Filter, Snug Fit GoPro Lens Filter with
Amazon.com : SOONSUN 3 Pack Dive Filter for GoPro Hero 5 6 7 Black Super Suit Dive Housing - Red,Light Red and Magenta Filter - Enhances Colors for Various Underwater Video and Photography Conditions : Electronics
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 Red Snorkel Filter for HERO6 Black & HERO5 - Black — Glazer's Camera Inc
Amazon.com : Underwater Camera Dive Filters for GoPro Hero 5, 6 and 7 Black Super Suit Waterproof Housing Case in Red, Light Red, and Magenta, Professional Color Correcting Photography Accessory : Electronics
Diving Filter Kit for GoPro Hero 6 / 5 Black - 3 Filters - Frame – CamKix