Heat Shrink Tubing Kit Heat shrinkable tube is made of high quality soft crosslinked polyolefin material, which has the advantages of insulation, corrosion resistance, wear resistance, low melting point, waterproofing, sealing and high adhesion. Package Included: 1x Plastic Box 560pcs Heat Shrink Tubes 90pcs 1mm Heat Shrink Tubes 70pcs 1.5mm Heat Shrink Tubes 80pcs 2mm Heat Shrink Tubes 70pcs 2.5mm Heat Shrink Tubes 50pcs 3mm Heat Shrink Tubes 45pcs 3.5mm Heat Shrink Tubes 40pcs 4mm Heat Shrink Tubes 25pcs 5mm Heat Shrink Tubes 20pcs 6mm Heat Shrink Tubes 25pcs 7mm Heat Shrink Tubes 25pcs 10mm Heat Shrink Tubes 20pcs 13mm Heat Shrink Tubes Specification: Color: BlackRedGreenYellowBlue Length: 45mm Material: Polyolefin Flame Retardance: VW-1 Cross-Section Shape: Round or Flat Shrinkage Ratio: 2:1 ( The maximum shrinkage rate is 50 Percent of the original tube diameter. ) Minimum Shrinkage Temp: 158 Degree Fahrenheit Full Shrinkage Temp: 257 Degree Fahrenheit maximum Ambient Temperature:-58 to 302 Degree Fahrenheit Heat Shrink Tube is used for electrical insulation, strain relief, solder joint protection, group lines marking, corrosion protection. Heat Shrinkable Tube is very suitable for radio circuit control DIY enthusiasts, allowing your circuit control ideas to be perfectly realized.