Ensures a Proper Bend Radius to Reduce Cable Stress and Keep Your Ladder System Neat The Smart Rack SRLRADIUS12 helps reduce bend-induced stress, pinching, pressure points and fatigue in your cable ladder system. It mounts to the cross member of a 12-inch-wide ladder section to route stubborn cables down from the runway. This allows for builds that are more comprehensive and keeps everything neat atop the ladder system. All mounting and installation hardware is included. The cable radius drop fits solid and tubular steel runway measuring 1. 5 x 0. 375 inches (38 x 9. 5 millimeters). The SRLRADIUS12 is designed for Tripp Light's SRCABLELADDER, SRL90BEND12 and other compatible 12-inch straight and 90-degree ladder sections.