With this adaptor, you can convert the common 2.1 x 5.5 plug to over 15 different sizes. A 20 AWG 6 inch cable with a 2 Pin Socket molded on one end and the other end is molded to a 2.1mm x 5.5mm DC Coaxial Power Plug. Polarity reversible. Create your own DC extension cords and adaptors form our extensive selection of interchangeable DC plugs and DC jacks. Compatible with Radio Shack Adapataplugs. Additional Model #'s 70-48-1257 70-481257 48-1257 481257 UPC: 038975812571