3M 927388 9" Heavy Wall Heat Shrink Tubing ITCSN 3 Pack heat shrinkable cable sleeves are designed to provide reliable performance for electrical splices, connections and terminations, as well as mechanical and environmental protection. ITCSN heavy-wall cable sleeves are cross-linked polyolefin. They are highly split resistant and fast shrinking to provide rapid installation. The cut to-length sleeves come standard with a factory-applied adhesive/sealant.