TST/Impreso, Inc. Magnetic Card Reader Cleaning Cards, 2.1" x 3.35", 50/Carton (IPS2391) EachTST Impreso, Inc. Magnetic Card Reader Cleaning Cards Prevent misreads and scan failures. Proprietary Waffle Technology removes both dust and residual magnetization from just about any POS or security card reader. Individually wrapped and easy to use, all it takes is a single swipe to keep your systems glitch free. Global Product Type: Electronics Antistatic Cleaners Application: Card Readers Applicable Material: Metal; Plastic Dirt Types: Dust;