5/32" ID (before shrink) black high-shrink-ratio adhesive-lined shrink tubing. 1 ft. piece. Made of polyolefin. Has 4 to 1 shrink ratio. With a 4 to 1 shrink ratio, this shrink tubing can encapsulate just about any odd shape you may need to permanently seal off from the environment. Adhesive lining allows the shrink tubing to attach itself to the wire or terminal for a watertight seal. Use this shrink tubing in applications that need shelter from the elements or contaminants. Polyolefin is the standard-bearer in the shrink tubing market. It heats evenly, doesn't bubble or split, and is self-extinguishing. It also offers greater flexibility than PVC shrink tubing. Install with a butane torch or heat gun.