1Smooth surface, uniform thickness, no obvious spots, no oil traces, no impurities. 2Tested at 100C, the transverse shrinkage is 483%, the longitudinal direction is 123%, can be close to the product. 3It can be shrunk with a heat shrinkable machine, or it can be shrunk with a hair dryer or boiling water. 4The flexibility is very good, after the package shrinks, it will fall on the concrete floor in three directions from 1 meter high without cracking. 5After the package is shrunk, it is stored under the environment of 30 C, and no color change such as fading or discoloration occurs.