The Hyperion Buoyancy Foam Float Tube Set contains two high density foam buoyancy tubes. Any 25 mm outer diameter arm can go through the middle, which allows you to add buoyancy to your underwater camera system.
The measurements for the Hyperion Buoyancy Foam Float Tube Set consists of an outer diameter: 5.5cm, inner diameter: 2.5cm, length: 7cm. The buoyancy capacity of the medium float tubes measures +0.14kg each.