The Phoenix Contact ZB 5,LGS:FORTL.ZAHLEN 31-40 marker strip is a crucial accessory for terminal blocks, enabling clear and consistent labeling for efficient identification and maintenance. This 10-section strip is horizontally labeled with consecutive numbers from 31 to 40, making it ideal for applications requiring sequential numbering of circuits. The white color enhances visibility, while the compact 5mm width ensures compatibility with a wide range of terminal blocks. It is commonly used in industrial automation, control panels, and electrical distribution systems to improve organization and reduce errors during troubleshooting and modifications.