modify the surface clean and smooth can immediately write lightweight easy to carry suitable for computer print copy fax write the file . Environmentally friendly, safe and non-toxic Modify surface cleaning and leveling Economic, convenient, and strong coverage Using directions: 1)place the tip at ared that you wish to correct ,but not to shake with deflection 20the correction will be more effective when there is a piece of paper or flat thing below 3)don't make the tape to be "s"shape when using ,otherwise it will bring the rupture and breakage to the