Reusable label holders: the data card holders are flexible, can be easily applied or moved to metal surfaces and applied repeatedly thanks to the magnet backing Labeling: write on the included paper strip, slide the paper insert and the transparent protective film, stick the magnetic label holder on a clean and flat surface, saving time and making repositioning easier than traditional adhesive labels Simple style: the magnetic holders are in simple black and white color, suitable for offices, workshops and daily use, the protective film is transparent and clean to keep the text on the labels clear and clean for a long time Applicable size: the magnetic data card holders measure 3 inches / 7.62 cm in length and 1 inch / 2.5 cm in width, very practical for working or studying, can be applied to many occasions, which makes your work or life more convenient color: black Material: Soft magnetic rubber Package Contents: 180 x Magnetic Label Holders 180 x Protective Films 360 x Replacement