The 3M 7000099144 Heat Shrink Sleeve, Glueless, Thin Walled, is a thin walled, red colored, 9mm heat shrink sleeve with a 3-to-1 shrink ratio. It is 7 meters long and manufactured by 3M. The sleeve is used to protect and insulate electronic components and wiring, provides abrasion resistance and acts as a strain relief. It has no glue, making it easy to install.