Brother Heat Shrink Tubing, Black on Yellow 0.8 → 3.1mm Sleeve Dia. x 1.5m Length 3:1 Ratio, HSE Series

The Brother Heat Shrink Tube is a special non-adhesive tape which is made up of special material that is wound in the tape cassette as a flat tube. Once printed with the relevant identification details, the tube is opened up and passed over a cable or terminating connector. Once heated using a heat gun, the tube shrinks to about half its original width, and in doing so grips the cable.

Identification of cables
Identification of terminating connectors
width 5.2mm