3M™ Scotchlok™ Color-Coded Grease Filled Butt Connector ensures an ideal fit while offering reliable and safe performance. The moisture-resistant Connector has a nylon-insulated, butted-seam barrel and withstands temperatures of -40 to 221 degrees F (-40 to 105 degrees C). Copper construction offers good conductivity and a tin-plated finish resists corrosion.