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UL 3239 wire is a high-voltage lead wire with extruded modified FEP (Fluorinated Ethylene Polypropylene) insulation. This insulation provides easy, clean stripping with automated equipment. These wires are intended for use in television receivers, transformers, and other demanding high-voltage applications. Versions with different wall thicknesses are available for 10 KV, 15 KV, and 20 KV ratings.