Gardner Bender 1 in. x 4 in. Heat Shrink Polyolefin Thin-Wall Tubing, 2-Pack is for cable insulation, marking, and bundling needs. This tubing is designed to repair appliances, extension cords, or small electronic cords that have exposed bare wires, providing superior mechanical, abrasion, and moisture protection. Made from flame-retardant polyolefin, it resists common fluids and solvents, ensuring durability and safety. The tubing features a 2:1 shrink ratio, meaning it shrinks to half its inner diameter size for a secure fit. It is self-extinguishing, so it will not drip, crack, or flow when heated to shrink temperatures. Additionally, it a dielectric strength of 600 V/Mil, making it reliable for electrical insulation purposes. Model Number: HST-999