Comes with its own compartmented storage case. Contains 7 of the most frequently used sizes. Perfect for wiring repairs, solder joints, and making that wiring job look very professional. The added bonus of heat shrink when used it give that bare joint much extra strength. Ideal for insulating bare wire and making that waterproof joint and strength to joints Simply heat to shrink. Using a blow torch, soldering iron, hot air gun or even matches. The glue lined heat shrink sleeveing has an adhesive liner that melts when heated to fill crevices and creases in the bare wire. When cooled the tube forms a tough rigid covering and gives a permanent waterproof joint with added strength. Includes • 30 - 2.0mm x 40mm • 25 - 2.5mm x 40mm • 20 - 3.5mm x 40mm • 20 - 5.0mm x 40mm • 16 - 7.0mm x 80mm • 8˜ -˜ 10mm x 80mm • 8˜ -˜ 13mm x 85mm