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 gun is up to 212 Fahrenheit (Fahrenheit), then glue inside will soften and seal the connection Safe & ECO-Friendly- Our heat shrink tubes are both UL & CSA certified for up to 600V, 257 degrees Fahrenheit which ensures its safe and reliable They are also RoHS Compliant, Formaldehyde (HCHO) Free, protect you and your family from toxins High Quality Waterproof Long service life High Strength Toughness Corrosion resistance Good electrical insulation High temperature resistanceCustomized 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 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 Fast & Easy UseIt is 3: 1 heat shrink ratio, and will shrink up to 1/3 of original, only use a heat gun heating for it Also Includes handy plastic container for easy organization and storage Color: BlackMaterial: PVCPacking size: 190x130x32mmHeat shrink ratio: 3:1Operating Temperature: -131 Celsius to + 257 FahrenheitShrinkage Temp: 212 Fahrenheit (Fahrenheit)Full Shrinkage Temp: 230 Fahrenheit maximumTensile strength: 10 4MpaDielectric strength: 15 kV / mmFlammability: Flame RetardantHow 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 contact the tube until it becomes cool Quantity: Total 130 pcs:45pcs 3 5 inch lengths Diameter 3/32 inch35pcs 3 5 inch lengths Diameter 1/8 inch20pcs 3 5 inch lengths Diameter 3/16 inch15pcs 3 5 inch lengths Diameter 1/4 inch8pcs 3 5 inch lengths Diameter 3/8 inch7pcs 3 5 inch lengths Diameter 1/2 inchPackage Contents:1x 130Pcs(6 Sizes) Dual-Wall 3:1 Red Adhesive Lined Heat Shrink Tubing1x Plastic BoxOnly the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm