Cable Tray Roller. No loose pieces. Adjustable legs to fit onto tray width sizes of 12" (304.8 mm) to 36" (914.4 mm). Mounting system above tray. 4 conveyer roller guide with 2 retained spring pull-pin release to easily remove cable from both sides. Closed conveyer roller guide that traps cable within guide without damaging cable jacket. 6' (1.8 m) long durable retractable ratchet strap for sturdy assembly onto tray. Easily handle forces of up to 200 lbs (45.4 kg). Designed and Assembled in USA.