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 180pcs Heat Shrink Tubes 60pcs 1.5mm Length 30mm Heat Shrink Tubes 40pcs 2.5mm Length 30mm Heat Shrink Tubes 20pcs 3mm Length 60mm Heat Shrink Tubes 16pcs 4mm Length 65mm Heat Shrink Tubes 12pcs 5mm Length 35mm Heat Shrink Tubes 8pcs 6mm Length 65mm Heat Shrink Tubes 12pcs 8mm Length 65mm Heat Shrink Tubes 12pcs 10mm Length 100mm Heat Shrink Tubes Specification: Color: BlackRedGreenYellow 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.