3M™ Scotchlok™ Heat Shrink Brazed Seam Ring Tongue ensures an ideal fit and offers reliable performance. The brazed-seam barrel is covered by an adhesive-lined polyolefin tubing to offer moisture-seal protection. It withstands temperatures of 221 degrees F (105 degrees C). Electrolytic copper construction offers good conductivity and a tin-plated finish resists corrosion.