The GTB 7638 B with Heat shrink sleeve, glueless, 2: 1, 76.2mm, blue, and polyolefin manufactured by Tasker is a cable encapsulation product. It is designed to fit easily over cable, wire or connectors, providing an effective waterproof seal along with extra protection and insulation. The blue color-coding allows for easy identification when using multiple cables in the same area. The sleeve's heat shrinkable 2:1 ratio allows it to tightly fit over the cable and ensure a complete seal. The polyolefin material used in the sleeve is highly chemical and abrasion resistant, making it an excellent choice for a variety of environments and applications. This sleeve is perfect for telecommunications, automotive, marine, and aerospace applications.