SQ-C1.5-180 - 1.5 meter (4.92')The SQ C1. 5 180 is a 1. 5 meter (4. 92') diameter 12'' box truss circle. It is made from the same high quality 6082 T6 aluminum as the rest of our 12'' truss for high strength and a low self weight. The circle is comprised of two180 arcs that can be purchased separately for custom designs or arch ways (please call for details). Features: 1. 5m circle (4. 92') 12'' aluminum box truss 2'' O. D. main tube 2MM (. 08'') wall thickness 2 x 180 arcs