The Lapp Kabel 83251602 Black 6.4mm Heat Shrink Sleeve (2:1 Glue-less) is a heat shrink sleeve that provides insulation when used with wires and cables. Made out of polyolefin, this heat shrink sleeve can be used to protect, isolate, bundle, and identify electrical components that require protection from abrasions, moisture, and other elements. The sleeve is flame-retardant and resistant to most oils, acids, and alkalis, making it suitable for a variety of applications. It shrinks when heated and is quick and easy to install and is color-coded for easy identification.