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
Freewell 4K Series Standard Day Filter Set for GoPro FW-H9B-STD
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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
Freewell Standard Day ND 4-Filter Set for GoPro HERO FW-H5B-ND
Go Pro Hero 4 Nd Lens Filter For Gopro Hero 4 / 3+ / 3 And Fit Sj5000 Action Camera Accessories - Sports & Action Video Cameras Accessories - AliExpress
Set of 4 ND filters GoPro Hero 11 10 9 - Agence Digitale