This pack of 100 PVC 37 bit proximity cards seamlessly integrate with HID's H10304 37 bit proximity access system. On top of working perfectly with your current proximity access program, all UltraSecure cards are more cost effective than their HID counterpart, ship extremely fast and come with a lifetime warranty. Included is a non-encoded magnetic stripe ready to be encoded by the printer and software. These 30 ml PVC cards are credit card sized and can be printed on from any pvc card printer. Retransfer printers are recommended for printing on all prox cards and smart cards in order to get the highest quality print.