Heat shrink tubing ideal for repairing electrical cords on tools and appliances, handle grips on hand tools, and more. Full shrink ratio of 2-1 forms a smooth, tight fitting insulation for most applications with a high degree of flexibility. Carefully apply heat (below 200 degrees Fahrenheit) around the tubing until it shrinks tightly. 4-inch length. UL (Underwriter's Laboratories) listed, CSA (Canadian Standards Association) approved.