ProX XT-JB6W-4W-BLK 6 Way F34 Corner Block W/16 4 Way Half-Conical Couplers Black Powder CoatedThe ProX XT JB6W 4W BLK 6 Way Square Truss Junction Box 3mm Wall is a universal connecting point for F34 trusses, and it's equipped with connecting hardware for use with ProX XT F34 square truss components. It features 2" outer diameter tubing and 3 4" diagonal bracing. It has XT Series 3mm thick tube walls, this truss junction block is strong and can be used for many applications. It is built to the highest standards of safety and performance.