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
This Alu-Core is 9' (2.7 m) long, when assembled. It replaces old catalog #2922.