Ty-Ductâ„¢ Wide slot wiring duct constructed of flame-retardant PVC. Greater sidewall rigidity with increased versatility. Dual score lines are designed to yield clean breakoffs at the base of the slot and the duct. Restricted slot design makes sure that wires are held with or without the cover inserted. Rounded edges keep hands and wires free of abrasion. V-shaped slot lead-in enables easier and faster wire installation. Non-slip cover does not slide easily and resists vibration. Flush cover attaches flush with sidewall for finished look. Improved flush sidewall and cover style for greater wire capacity.