The ALPHA WIRE part F62111/4-BK072, also known as FIT-621, is a high-quality black heat shrink tubing. It comes in a package containing three pieces, each measuring 11/4 in diameter and 6 inches in length. This tubing is designed for electrical insulation and protection applications. It effectively seals and protects wires, cables, and other components from moisture, chemicals, and abrasion. The tubing is made of durable materials to ensure long-lasting performance and reliable protection. Ideal for various industrial and automotive applications, the FIT-621 tubing from ALPHA WIRE is a versatile solution for all your electrical insulation needs.