The Phoenix Contact ZB 5,QR:FORTL.ZAHLEN 31-40 marker strip provides a simple and effective solution for identifying terminal blocks in electrical panels and control systems. This 10-section strip is vertically labeled with consecutive numbers from 31 to 40, ensuring clear and organized identification. The white color offers high visibility, and the compact width of 5mm makes it suitable for a wide range of terminal block applications. It is commonly used in industrial automation, power distribution, and control panel building to enhance maintainability and reduce errors during maintenance or troubleshooting.