This genuine Brother 21.0mm HSe-251E heat shrink tube tape is designed specifically for permanently marking and identifying cables and wires | With a shrink ratio of 3:1, the HSe-251E black on white tape is recommended for use with cables between 4.2mm and 13.5mm in diameter | Compatible with P-touch label printers that show the HS or HSe logo on the tape cassette cover | 21.0mm wide, 1.5m long | Shrinks when heated to allow easy cable identification | High quality genuine Brother cassette | Ensures durable, easily readable results | Suitable for cables between 4.2mm and 13.5mm in diameter | Shrink ratio 3:1