This 25mm x 100m Fish Paper (Barley Paper) Insulation Tape is specially designed for 18650 lithium battery pack assembly and insulation protection. Made from high-quality vulcanized fiber paper, it provides excellent electrical insulation, flame resistance, abrasion resistance, and mechanical strength. It is widely used for battery cell wrapping, pack insulation, electrode isolation, and structural protection in power batteries, energy storage systems, and electronic devices.