The Phoenix Contact ZB 3,5,LGS:FORTL.ZAHLEN 11-20 marker strip is a crucial accessory for organized and efficient terminal block management. This strip provides a clear and permanent labeling solution for your electrical connections, reducing errors and improving maintenance. The sequential numbering from 11 to 20 allows for easy identification of individual terminals, streamlining troubleshooting and ensuring accurate wiring. Ideal for industrial automation, control panels, and various electrical applications, this marker strip contributes to enhanced safety and operational reliability.