Hyperion provides you with different sized Buoyancy Float Tube Sets. This is a set of two small high density foam buoyancy tubes.
Their outer diameter measures 5.5cm, their inner diameter measures 2.5cm, and they are 5cm in length. The buoyancy of these small float tubes is +0.1kg.
It will be delivered with two stopper rings and cable ties to anchor the tube on an arm that is attached to your camera system.