The HellermannTyton 333-30904 is a 3:1 flexible 9/3 yellow heat shrinkable tubing sleeve. This tubing is specifically designed to protect cables and electronic wires from dust, moisture, and mechanical stress. It has a small, but powerful shrink-to-fit ratio of 3:1. This means that the tubing will shrink to about one-third of its original size when heated. In addition, it provides environmental protection from oil and solvents. This tubing is flame retardant, and is compatible with extreme temperature environments from -55°C to 135°C. It has multiple outside diameter, wall thickness, length, and color options available, allowing the user to customize it to their specific needs.