The ALPHA WIRE part F2213/8-BK103, also known as FIT-221 3/8" BLACK, is a high-quality heat shrink tubing designed for electrical insulation and cable organization. This tubing is made from durable and flexible material that easily conforms to the shape of the cable, providing a tight and secure fit.With a diameter of 3/8", this black heat shrink tubing is suitable for a variety of applications, including wire splicing, insulation, and strain relief. It offers excellent resistance to chemicals, solvents, and abrasion, ensuring long-lasting performance and protection in harsh environments.This package includes 25 individual 4-foot lengths of tubing, providing ample supply for various projects. With its easy-to-use design, the FIT-221 tubing can be quickly and securely applied using a heat gun or any other heat source, creating a reliable and professional finish.Invest in the ALPHA WIRE FIT-221 3/8" BLACK heat shrink tubing for all your electrical insulation and cable management needs. Its exceptional quality and wide range of applications make it the ideal choice for professionals and DIY enthusiasts alike.