Specifications:
Material: Polyethylene
Color: Clear
Shrinkage Ratio: 2:1 ( will maximum shrink to 1/2 of its supplied diameter )
Round Diameter: 50mm / 2" (Before Shrinking), 25mm / 1" (After Shrinking)
Minimum Shrinkage Temp: +70 Degree Celsius
Full Shrinkage Temp: +125 Degree Celsius maximum
Operating Temperature:-55 to 125 Degree Celsius
Rated voltage: 600V
Dielectric strength: 1 KV
Flammability: VW-1, Flame Retardant
Item Shape: Round/Flat
Total Length: 4.8M/16Ft
Heating tool: hot air gun,lighter or air dryer
Compliant: the standard of RoHS, UL and CSA certified.
Appliance: used for appliance/auto electric wire cable harness wrapping
package content: 1 x heat shrink tubing

How to use it?
1. At First choose the right size tubes, as It is 3:1 heat shrink ratio, and will shrink up to 1/3 of original diameter, please measure diameter of wire which is equal to the size of tube after shrinking.
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 touch the tube until it becomes cool.

NOTES:
PLEASE BE CAREFUL WHILE USING LIGHTER OR HEAT GUN.
PLEASE STAY AWAY FROM WHILE HEATING.