This weather resistant, heavy duty Runway Dog tie-out trolley is 25 ft long with a 15 ft Down Line. It has a heavy-duty metal pulley and vinyl-coated steel cable. This trolley system is not for extremely large dogs, and very active and aggressive dogs should not be left unsupervised. Install system away from obstructions or areas where cable may become entangled. Damage may result if cable is continually flexed around sharp corners. Inspect cable often for kinks or knots and replace cable if excessive wear is evident. Instructions Included.