[Printer Cleaning Kit]: The printer cleaning paper includes 20 card reader cleaning cards and 3 hot paper printer cleaning pens to clean the printer and card . [Let the printer/card reader work again]: Our transaction card cleaning kit has powerful cleaning capabilities, which can remove stubborn adhesive deposits, easily fix blurry printed materials caused by dirt and adhesive blockage, and avoid damage to the printer/card reader. [Precision Cleaning]: The pen tip design releases a certain number of solutions to prevent potential damage caused by free flowing liquids. These cards also contain 99.9% cleaning solution to quickly dissolve and remove dirt, residues, adhesives, and other debris, and dissolve with a quick drying effect. [Wide compatibility]: The cleaning card is suitable for most card and ID printers, hotel door locks, POS machines, ATMs, and coin vending machines; Although the print head cleaning pen is suitable for all thermal printers. When the printing quality deteriorates, this is the most cost-effective product for maintaining and extending the lifespan of the machine. material: plastic Color as shown Package Contents: 20 x card reader cleaning cards 3 x hot paper printer cleaning pen 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.