our boom arm truss is compitable with 290mm and 289mm box truss
you can adjust it as you need with following instructions.
BOOM ARM Truss Extension Tube with Dual Welded Clamps 1.5m For F32 F33 F34
FOSHAN DRAGON STAGE
No.7,Xiaxi Industrial Area,Heshun,Nanhai District,Foshan,528241,Guangdong,China.
+86 136 3132 8997