Function: This magnetic cleaning card is specially designed for cleaning motorized atms and other closed reading system. It can be smoothly inserted into any brands atms, like ncr, diebold, siemens etc. Once inserted, it will clean the magnetic heads, card pathways, transport belts and rollers. It can be used as an emergency maintenance product after card reader failures, and also used as a regular maintenance product to prevent card reader failures. Features: safe. Effective. Easy Pre-saturated and individually sealed cleaning card, it will clean your reader by simple insertion. Cleaning layers: softer, don't fluff, don't desquamate, don't form the secondary pollution. Solution: anti-corrosives, anti-static, instantly evaporate after using, don't damage your reader. Specifications: Material: white non-woven fabric/pvc core Dimensions (inch): 2.1(+/-0.04)f-3.345(+/-0.04) Dimensions (mm):53.34(+/-1.0) f-84.96(+/-1.0) Thickness (inch):0.033(+/-0.002) Thickness (mm):0.86(+/-0.05) Cleanser volume: 3ml(+/-0.5). Usage: Insert the cleaning card into atm, then atm display will notice. This is an unavailable card. We don't deal with the cardf+ and so on, then card is exited automatically. Then turn around the card and repeat above operation, the card is exited again thus this cleaning card just finished a cleaning process. You will find the cleaning card becomes so dirty. You can change a card to clean again until there are no residues in atm. If one atm is not too dirty, you can use the same cleaning card to clean another atm. But the principle, after finishing the cleaning, there are no residues in atm and cleaning card is not dirty. Neutral packaging, customized packaging.