Are you bothered by the fact that wrapping cable wire connection with electric tape which is ugly and not safe enough. Now the good news is that our heat shrink tubing can avoid these troubles and give you a tidy connection. Features - Color: Assorted color. - Material: PE, crosslinked polyethylene. - Size: 17.00X13.00X3.60cm/ 6.68X5.11X1.41inches. - Our heat shrink tubes is safe and reliable. Does not contain heavy metal and other environmentally hazardous substances. Protect you and your family from toxins. - With a organized storage boxes. You can throw the heat shrink tubing kit in your toolbox and not have to worry about size getting mixed together. - There are 750 pieces in all, including 12 different sizes in different colors, which is easy to classify and practical in use. For electricians, this set of would be indispensable. - These insulation could be used in various scenarios. Such of lines marking, older joint protection, capacity protection etc. - Easy to use, shrink quickly, durable and evenly-neat and clean way to create a tight bond with connecting wires, which is convenient to use with heat . Package list: 3 pcs x 180pcs x heat shrink tubes (1.0 x 45mm, black) 3 pcs x 150pcs x heat shrink tubes (1.5 x 45mm, red) 3 pcs x 100pcs x heat shrink tubes (2.0 x 45mm, yellow) 3 pcs x 70pcs x heat shrink tubes (2.5 x 45mm, green) 3 pcs x 50pcs x heat shrink tubes (3.0 x 45mm, black) 3 pcs x 30pcs x heat shrink tubes (3.5 x 45mm, blue) 3 pcs x 40pcs x heat shrink tubes (4.0 x 45mm, red) 3 pcs x 25pcs x heat shrink tubes (5.0 x 45mm, blue) 3 pcs x 25pcs x heat shrink tubes (6.0 x 45mm, blue) 3 pcs x 25pcs x heat shrink tubes (7.0 x 45mm, red) 3 pcs x 25pcs x heat shrink tubes (10.0 x 45mm, black) 3 pcs x 20pcs x heat shrink tubes (13.0 x 45mm, black)