High-Resiliency Strengthening Bar Helps You Create Custom Cable Management Schemes The SmartRack® SRWBHDCPLR includes a black powder-coated metal strengthening bar and three couplers, each with an M6 flange nut and M6 x 20 carriage bolt for easy installation with your wire mesh cable tray. This kit allows you to connect two straight sections of cable tray to extend your cable management application along the wall, floor or ceiling of your data center, network closet or industrial space. It is also ideal for creating reductions. The SRWBHDCPLR is compatible with 6-, 12- and 18-inch wire mesh cable trays. For best practice, connecting the tray sections at the bottom with an extra coupler (sold separately) is recommended.