Rely on our 3M Highland Color-Coded Butt Splice Connector to keep your connections secure and snug. This dependable, yellow connector features a corrosion-resistant, tin-plated finish and an electrolytic copper construction to provide great conductivity. It also has a butted-seam barrel with vinyl insulation, which allows it to operate reliably in temperatures ranging from 40 to 221 degrees F (-40 to 105 degrees C).