This is a Foba COARO AS 8" (20.3 cm) Combitube Section. The heart of the Foba Combitube System is the tube itself. This Combitube is made of Black, Aluminum with a non-reflective matte surface. Each end has a unique cone connector that allows combining an unlimited number of Combitubes.
Combitubes are available separately in several different lengths. Three different kits are also available, which include connectors, arms, clamps -- virtual Erector Sets for your studio needs:
The Mini (#31-0402)
The Midi (#31-0401)
The Maxi (31-0400)