The Lapp Kabel 83251620 is a heat shrink sleeve with a 2:1 shrink ratio, 3.2mm diameter, and a blue polyolefine coating. It can be used for a variety of electrical insulation applications, including cable harnesses and connectors, as the heat shrink sleeve provides a tight, secure fit without the need for glues or adhesives. The blue polyolefine construction provides a flame-retardant, abrasion-resistant covering that is both durable and flexible.