... , 500×600mm , 520×760mm, 600×760mm Each truss length from o,5m to 4m available .Shape of Truss1. square Truss2. triangular ... .Those truss systems is used to hung speakers , hung led screen , hung audio , and hung lights3.They can used for exhibition ... , Welcome to Visit us in Guangzhou .China TUV Certificate LED screen Truss ,lights truss system,Stage truss,tent truss