heat shrink tubing is designed for insulating and sealing low voltage cable applications where lighter weight and greater flexibility are important. Internally coated with a dual purpose thermoplastic liner to provide excellent insulating/environmental sealing protection for splices, connections, jacket repairs, and terminations.3:1 polyolefin heat shrink tubing is an effective and economical way to professionally finish the ends of any wire harness application. The over-expanded product configuration easily fits over the end of a connector, and shrinks down to 33% of its original diameter to fit snugly over the wires.