The NT-MIL-3/4-0-BULK-SP heat shrink tubing is a durable and versatile solution for protecting cables and wires in harsh environments. Made from black Chlorinated Polyolefin, this tubing has a high shrink ratio of 1.75:1, ensuring a tight and secure fit. With a shrink temperature of 135 °C, it is easy to install using a heat gun. Operating efficiently in temperatures ranging from -70 to 121 °C, it provides reliable insulation for wires. The recovered diameter of .429 inches and expanded diameter of .75 inches allow for flexibility in application. Also known as part number D67481-000, this tubing is a must-have for any project requiring abrasion protection and heat shrink capabilities.