[Shrinkage and Insulation]The heat shrink tubing is made of polyolefin, which ensures the shrinkage ratio of the heat shrink wrap 2:1 and electrical insulation, and the glue design inside can also make the wiring morefarm. [Easy to Use and Shrink]This heat shrinkable cable sleeve is very easy to use and shrink, just wrap your target wire and shrink it with a small hot air blower, small flame torch, lighter-cigar, a heat gun or even a hair dryer or a soldering iron.[Widely Application]With its compact design and wear-resistant function, the heat shrink connector can be used in many places. Such as broken wires, electrical insulation, mechanical protection, wire bandwidth,connecting wires, process of wire ends, wire or cable junctions, daily repairs, etc. [Convenient for Storage]Packing with the transparent plastic box which makes the shrink wrap tube easy to store.Also separated by plastic plates, it is easy for you to classify the different specifications of the tubes. [You Will Get]2pcs 3:1 shrink ratio heat shrink tubing, 333pcs in total, 7 sizes with different diameters of 2.4mm or 3.2mm or 4.8mm or 6.4mm or 7.9mm or 9.5mm or 12.5mm and 45mm long for each. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.