This mount has an aluminum C channel with rubber piping on the open edges.
This channel is velcro fastened against a bar or pole to create a mount point for whatever device you wish to attach. This was designed for a vario on a hang glider crossbar, but will work equally well for terrestrial needs.
Loosen clamp around ball to rotate to any angle.
Mount connects to fastener via a rubber hose.
Swivel base.
