The Assorted box of Black 2:1 Heat Shrink Tubing is used for electrical insulation, cable bundling and the provision of good physical protection to pipes and wires. Please find our heat shrink gun to shrink the tubing here.For more information on heat shrink tubing please review our comprehensive guide to heat shrink tubing detailing how to pick the correct size and how to apply it.Our buyers guide also include information on the common uses of heatshrink & how to correctly use heatshrink tubing. Assorted box contents:All pieces are 40mm in length1.6mm = 50 pieces2.4mm = 50 pieces3.2mm = 65 pieces4.8mm = 60 pieces6.4mm = 50 pieces9.5mm = 45 pieces12.7mm = 20 pieces19.1mm = 20 piecesMaterial & Characteristics:Polyolefin - Standard wall heat shrink tubeFlame retardantVery good chemical and solvent resistanceExcellent electrical and physical propertiesAnti-staticFlexible and high dielectric strengthApplications:Electrical insulationCable bundlingGood physical protection to pipes and wiresChemical Resistance:FuelHydraulic fluidLubricating oilShrinkable Temperature:80COperating Temperature:-55C to +125C