Freewell Nd Filter Kit Includes Nd4, Nd8, Nd16 And Nd32 Filter (4-pack) For Gopro Hero7 Black, Hero5 & Hero6 Black Camera - Camera Filters - AliExpress
GoPro HERO11/HERO10/HERO9 Black Filters - Bright Day – 4Pack
Amazon.com : Freewell Standard Day - 4K Series - 4Pack ND Filters Compatible with Hero11, Hero10, Hero9 Black : Electronics