Versatile & DIY Helper- Multiple sizes high-quality heat shrink tubing for your choose, they can be used for solder joint protection, group of lines marking, resistance electric capacity reason protection etc. Note: Make sure temperature of your heat is up to 212℉(Fahrenheit), then glue inside will soften and seal the connection. Customized Protector- Our heat shrink tubing has the advantages of good electrical insulation, good tightness and corrosion resistance, High temperature resistance. Especially the Heat activated adhesive lining provides impermeable seal to salt water and other liquids, which hase better performance when you and your kids DIY. Fast & Easy Use- 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. It is 3:1 heat shrink ratio, and will shrink up to 1/3 of original, only use a lighter heating if the tube is small or hair dryer heating for large one. Also Includes handy plastic container for easy organization and storage. Good Tightness with Glue Lined Our heat shrink tubing has the advantages of good electrical insulation, good tightness and corrosion resistance, High temperature resistance. Especially the Heat activated adhesive lining provides impermeable seal to salt water and other liquids, which hase better performance when you and your kids DIY. How to use it? 1. First choose the right size tubes, as it is 3:1 heat shrink ratio, and will shrink up to 1/3 of original diameter. 2. Wrap the cable wire with the tube, then use a lighter heating if the tube is small or hair dryer, heat guns heating for large one until the wire was wrapped tightly. 3. Don't Press the tube until it becomes cool. Versatile & DIY Helper Multiplesizes high-quality heat shrink tubing for your choose, they can be used for solder joint protection, group of lines marking, resistance electric capac