<div> <ul> <li><b>Cord Length: </b>6 Ft<br /></li> <li>Barrel Connector is a 2.1 mm ID x 2.5 mm OD (fits most Respironics machines with a 12 VDC connection*, as well as some other brands.)<br /></li> <li>Note: Will function with the PR1 50 Series, but will not fit the System One 60 Series due to the design change required when the Heated Tube was added to the 60 Series. The pin diameter increased for greater amperage. If you have a PR1 60 Series use the Shielded DC Cord 1097568.<br /></li> </ul> </div>