The Hyper Tough 120-Piece Heat Shrink Tubing Assortment includes four tubing diameters in five different colors to handle various projects. This assortment is ideal for repairing insulating and adding strength to wire. The tubes have a 250 degree shrink temperature and reduce to half their original diameter for a secure seal. The clear storage case ensures easy organization and transportation of your heat shrink tubing collection keeping them neatly organized and readily accessible for your next project.