Supports cable and wire in communication closets, on backboards, equipment racks or wherever cable runs are required. These rings are made of high-strength, fire-retardant material with rounded edges to prevent damage to cable and wire insulation, while providing easy pull-through. Mounting hole configuration allows rings to be attached to most surfaces, including CPI equipment racks. The open design allows for easy adds, moves and changes eliminating the need to feed through cable. Mounting hardware not included.