This Matte Box connects directly to the lens of the GoPro Mission 1 and Mission 1 Pro. There are flexible extrusions on the inside that create a perfectly snug friction fit to hold it securely on the Camera. The 3 flags rotate and snap lock into varying angles. This can also hold lens attachments like macro lenses and ND filters. It should fit most lenses with 52mm threads but I can only guarantee that it will fit this lens set (Not Included) ⬇️ Amazon affiliate link - https://amzn.to/3S3oagF The GoPro will need to be set to Linear mode to avoid seeing the edges of this mat box in your video footage. This is a physical product that will be manufactured and shipped to your door. Designed by Luke Edwin. Manufacturing, shipping and customer service handled by Slant 3D