The Alpha Wire part number F4213IN-BK107 is a high-quality PVC heat shrink tubing in black color, with a 3-inch diameter and 2x4ft length. This FIT-421 heat shrink tubing is perfect for protecting and insulating wires and cables in a variety of applications. The tubing is easy to install and provides excellent protection against abrasion, chemicals, and extreme temperatures. Order now to ensure your wiring projects are safe and secure with Alpha Wire's reliable products.