The HID 40NKS-00-000000 is a high-security, non-programmable keycard that is made for use with access control systems. It features a secure, tamper-resistant construction and uses HID’s patented technology to provide superior performance and reliability. The keycard is made from durable PVC material and has a thickness of 0.03 inches (0.76mm). It operates at a frequency of 125 kHz and has a read range of up to 3.9 inches (10 cm). The HID 40NKS-00-000000 keycard is ideal for use in a wide range of applications, including commercial buildings, hospitals, universities, and government facilities, where high-security access control is necessary.