White nylon plastic with a matte finish and slight grainy feel.
About this Product
If you have different handlebar diameter, let me know, I will upload adjusted model.
To ensure the camera does not ever rotate in the attachment, use 600 grit sandpaper on the mount in places it contacts with your camera's attachment rings. After couple of minutes of sanding (at 600 grit this is really polishing) you will notice the mount starting to look shiny. Attach the camera and notice the improved holding power.