High-Resiliency Connecting Bar Helps You Create Custom Bends and Junctions. The SmartRack SRWBLCPLR includes a black powder-coated metal L-shaped connecting bar and two couplers, each with an M6 flange nut and M6 x 20 carriage bolt for easy installation with your wire mesh cable tray. By creating a secure connection point between two intersecting sections of cable tray in your server room or data center, you can create L- or T-shaped intersections that guide the direction of cabling to your liking. For best practices, attaching each L connector with four couplers (such as those included with Tripp Lite's SRWBUNVCPLR Coupler Kit) is recommended.