The CPI 110D Block Mounting System provides high-density, space-saving 110D style block mounting for 110D style blocks. The 4.25"W and 3"D cable support troughs along with the 3" W and 6.25"D vertical cabling rings provide capacity for the large cable bundles needed for maximum termination density. The basic frame, support troughs, cable tray, vertical cabling rings and horizontal support channels are available under one part number. The 110D Block Mounting System ships completely assembled for quick, easy installation.