Global Truss - F34 Corners and Junctions :: StageSpot
ProX XT-JB6W-2W Square Truss Junction Block 2 Way, Standard F34 Square Truss - VIP Pro Audio
Amazon.com: Universal Square Corner Junction Box Cube 0.29M 0.95 FT 6-Way Connection Fits All Major Name Brands 11.4" Truss Includes 12 pins/Clips : Musical Instruments