The Phoenix Contact ZB 5,QR:FORTL.ZAHLEN 131-140 marker strip is a crucial accessory for terminal blocks, offering a simple and effective way to identify and organize connections. This 10-section strip is vertically labeled with consecutive numbers from 131 to 140, ensuring clear and consistent identification. The white color provides excellent contrast for easy readability. Ideal for industrial automation, control panels, and electrical distribution systems, this marker strip contributes to improved maintenance, troubleshooting, and overall system reliability. Its compact 5mm width makes it suitable for a wide range of terminal block applications.