SPT-2 Black Lamp Cords with Plugs are 12 foot long. This size is ideal for floor lamps. Black color harmonizes with iron lamps.
Standard insulated 18 gauge wire has 2 parallel copper wires. The positive/hot is smooth, neutral/negative - has ribs. U.L. Listed for table & floor lamps were cord is exposed. Stripped, copper-tipped ends simplify wrapping wire around socket screws. Molded-on plugs are polarized and permanently attached to lamp cord. SPT-2 rating has thicker plastic insulation, see below.