Ex-Pro GoPro Hero 3, 3+, 4 Filter holder adapter to 58mm standard lens - CNC anodised Aluminum 58mm lens adapter simply locks on housing with hex lock screw on-site - converting your GoPro Hero 3,3+ & 4 to take standard 58mm Lens.
[Adapters only - for use with GoPro Skeleton Housing AHSSK-301 Not included] See images for a visual check.
1 Adapter  Lens Not included