Our top-of-the-line Mifare Classic 1K NXP Dual Technology & EM4200 Proximity Chip cards offer exceptional contactless smart card capabilities with 1K byte memory. These cards utilize the superior technologies of the NXP EV1 and EM4200 Proximity chips to ensure top-notch performance and security. Product Features:Sold in packs of 1001K byte memoryCR80 credit card size (86mm x 54 mm)