NTE's Medium Wall Heat Shrink Tubing is made from polyolefin and features a 3:1 shrink ratio, making it versatile for various applications such as telecom and power cable jointing and repairs. Suitable for aerial, underground, and direct burial installations, this tubing includes an adhesive lining to ensure waterproof protection. It comes in a 48-inch length, is black in color, and has a size of 4.72 inches.