[Shrinkage & Insulation]heat shrink tubing is made of polyolefin which ensures the heat shrink wrap 2:1 retraction ratio and the electrical isolation.[Easy to Use & Shrink]This heat shrink cable sleeve is very easy to use and shrink, just wrap your target wire and shrink it with small hot air blower,small flame blowtorch, cigarette lighter,hot air gun or even hair dryer or soldering iron.[Widely Application]With the compact design and wear-resistant function, the heat shrink connector can be used in many place.Such as broken wires, electrical insulation, mechanical protection, wire bandwidth, wire connection, wire ends process, wire / cable junctions, daily repairs,etc.[Convenient to Storage]Packing with the transparent plastic box which makes the convenient storage of the shrink wrap tubing.Also separated by plastic plates makes it is easy for you to classify the different specifications of the tubes.[You Will Get]750PCS electrical heat shrink tubes, of different diameters of 1mm / 1.5mm / 2mm / 2.5mm / 3mm / 3.5mm / 4mm / 5mm / 6mm / 7mm / 10mm / 13mm and 45mm long for each.Material:PEcolour:Black + Red + Yellow + Blue + greenPackage Contents:750 * electrical heat shrink tubesOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.