Essl presents proximity cards in both thin and thick variants, Utilizing 125kHz and 13. 56MHz frequencies in alignment with ISO standards Proximity-based technology. These cards feature dual-sided printing and are ideal for various uses, Including access control systems and time event tickets, These cards, And more, Staff identification cards, Tracking including entry tracking, Guest oversight—both thin and thick—composed of durable yet flexible materials PVC laminate composed of polyvinyl chloride; meets industry-standard specifications 125 khz thin/clam, Shell Generic 125 kHz thin ISO card, Measuring 0. 8 mm and compatible exclusively with 13. 56 MHz MIFARE technology from HID 125 khzhid iclass thin only