Heat shrink tubings are made of material, for use. Cover the area with them and shrink them with a heat tool, then the wire shrink wraps will wrap the wire tight and evenly within a few seconds, easy to use. Features -Color:Assorted Color -Material: Polyolefin. -Size: About 4.50X0.15X0.15cm/1.77X0.06X0.06in. - They can be used for group of lines marking, solder joint protections, etc. - It has the advantages of good electrical insulation, corrosion resistance and high temperature resistance. - Suitable for wire protection, data line protection, protection, insulation protection, wire markings, etc. - Effectively prevent the data line from breaking due to long-term use. - It has insulation and is suitable for protection of wire connections. Specification: Type Size: 1.5 x 45mm; 2.0 x 45mm; 3.0 x 45mm; 4.0 x 45mm; 5.0 x 45mm; 6.0 x 45mm; 8.0 x 45mm; 10.0 x 45mm. Shrinkage rate: 2:1 (provided that the maximum diameter is reduced by 1/2). Minimum shrink temperature: + 70 degree centigrade. Full shrinkage temperature: +110 degree centigrade maximum. Working temperature: -55 degree centigrade + 125 degree centigrade. Tensile strength: 10.4 Mpa. Insulation strength: 15 kV/mm. Package list: 1060 x heat shrink tubings