Brother p touch m tape 12mm blackwhite product overview brother p touch m tape 12mm blackwhite mk231bz designed for use with brother p touch label printers this labelling tape is perfect for ensuring that you can easily identify and label items this 8 metre long roll of tape provides tough durable labels that are clear and of a high standard this labelling tape has a width of 12mm and prints black text on a white background for high visibility labelling tape for use with brother p touc