Wide application: the magnetic holders are in simple 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 Easy to use: 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 Multiple sizes: Very handy for working or studying, can be applied to many occasions, producing much convenience in your work or life Material: these magnetic labels is composed of flexible c-channel magnets with full rubber magnet backing, label paper and plastic film can be insert into the magnetic card holder easily and can apply to any metal surface and change label easily Colour:Black & White Material:plastic Size:50 x 25mm Package Contents: 100 x magnetic label holders 100 x protective films 200 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.