This VL1A-F12-04NC-ACM12 is an inductive proximity sensor with a M12 mm Nickel plated brass body with a flush mounting design. It has a metal body length of 68 mm and is M12 , AC, NC, with a sensing distance of 4 mm and an 2m PVC cable. It has a power supply of 20~250V and protection rating of IP67. This highly durable sensor is perfect for Industrial Automation applications.