3M™ Highland™ Vinyl Insulated Butted Seam Block Fork is a lug connection terminal that ensures an ideal fit while offering reliable and safe performance. The terminal has a vinyl-insulated, butted-seam barrel and withstands temperatures of -40 to 221 degrees F (-40 to 105 degrees C). Electrolytic copper construction offers good conductivity and a tin-plated finish resists corrosion.