3M Automotive Products 37677 Heat Shrink Tubing Kit, 133-Piece Keeps electrical, physical and chemical properties balanced for a variety of industrial and military applications Use as shrink-fit protection and strain relief of wires, solder joints and more Use as shrink-fit protection and strain relief of wires, solder joints and more Insulate dig-in repairs, direct buried or submersible repairs and secondary splices without worrying about future performance Has a 3/32-in to 1/2-in expanded I.D.