HID 10301 Format 26bit Wiegang 125Khz Proximity II Cards, which can customize UID code number according client's need (Serial ID number or customizable UID code or write the same UID number ), and printed on card surface. Water and dust proof, printable, strong, durable, flexible, and resistant to breaking and cracking. Suitable for all brands ID printers. 26 Bit 10301 Format Cards - Does not require that a facility code or card start number are specified by the customer when placing an order. HID controls card numbering, ensuring that card numbers are never duplicated.