Amazon.com : GoPro Dive Filter for Dive Housing (Magenta) (GoPro Official Accessory) : Electronics
Isotta Magenta Filter for GoPro Hero 4S, GoPro Hero 3 and GoPro Hero 4
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
3 Colors Tempered glass Filters For Gopro Hero 8 Red Magenta Snorkel Lens Filter for HERO8 Black Housing Case Accessories - Walmart.com
Polar Pro Aqua Series Magenta Filter For GoPro Hero3+, Hero4 with Standard Housing