Brother heat shrink tube tape is designed specifically for permanently marking and identifying cables and wires. Shrinkability 3:1, Width 9.0mm, Black Print on White, Length 1.5mm PRO Tape Series (Black & Blue Package Design). Necessary to download and update the firmware for your printer (applies only to PC-connectable printers). Suitable for marking wires, network, optical and other cables with diameters of 1.6 - 5.4 mm. The tape shrinks in a ratio of 3:1; 50% or more in average; Recommended temperature 110 - 140 degrees Celsius. The tape complies with UL224 for operating voltage, temperature and flammability. Flammability rating VW1. Brother heat shrink tubes insulate up to 300V. Can be used in selected Brother printers that allow HSE tubes to be printed (PT-E300VP, PT-E550W, PT-P750W, PT-P900W, PT-P950NW).