The Manfrotto Alu-Core allows you to use the Expan system with uncored paper or cloth backgrounds. It consists of two aluminum sections which interlock by means of a joining casting. The Expans (available separately) are inserted into the Alu-Core and provide a core for background rolls.
This Alu-Core is 12' (3.6 m) long, when assembled. It replaces old catalog #2928.
Manfrotto 047-3 Alu-Core for Uncored Paper or Cloth - 12' (3.6 m)