Extension cords you won't want to hide. We didn't aim to reinvent the wheel, we just wanted to dress it up in some some new duds. Our cloth covered extension cords are woven in Massachusetts using three copper wires, each stranded and covered in PVC insulation. The wires are twisted together, padded, and braided with a durable cotton weave. Cords are then assembled in New York using solid brass plug blades that are set in a rubber plug (which will resist chemicals and stay flexible in extremely low temperatures). Includes a Phillips combination slot mount with terminal screws which meets all U.L. 498 requirements. These extension cords are recommended to be used in the home for small appliances. If you don’t know whether you need two or three conductor wire then please consult an electrician or building inspector.