GripWorks now provides two styles of Heat Shrink Tubing used especially in the electronics and electrical industries. Protect wires, repair worn areas, insulate or bundle multiple wires with single wall or dual wall Heat Shrink Tubing. Use a typical heat gun to apply the heat that reduces the diameter and seals the contents inside the tubing. Dual wall Heat Shrink Tubing includes an adhesive layer inside the tubing for an extra secure seal that prevents moisture from contaminating the items inside. Both styles of Heat Shrink Tubing are available in various diameters and colors. • Size – 4 • Length "L" – 4 • Package Quantity - 5/Bag