Reusable label holders: the data cardholders are soft, they can be easily applied or moved to metal surfaces and repeatedly applied because of the magnet back Quick labeling: write on the included paper strip, slide in the paper insert and the transparent protective film, stick the magnetic label holder to clean and flat surface, saving time and making reposition easier compared with traditional adhesive labels Simple style: the magnetic holders are in simple black and white color, fit offices, workshops and daily use, the protective film is transparent and clean to keep text on labels bright and clean for a long time Applicable size: the magnetic data cardholders are 3 inches/ 7.62 cm in length and 1 inch/ 2.5 cm in width, very handy for working or studying, can be applied to many occasions, producing much convenience in your work or life colour:Black Material:Rubber soft magnetic Package Contents: 240 x magnetic label holders 240 x protective films 480 x replacement paper strips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.