This genuine Brother 31.0mm HSe-661E heat shrink tube tape is designed specifically for permanently marking and identifying cables and wires | With a shrink ratio of 3:1, the HSe-661E black on yellow tape is recommended for use with cables between 6.3mm and 20.0mm in diameter | Compatible with P-touch label printers that show the HS or HSe logo on the tape cassette cover | 31.0mm 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 6.3mm and 20.0mm in diameter | Shrink ratio 3:1