The Phoenix Contact ZB 6,QR:FORTL.ZAHLEN 121-130 marker strip is a crucial accessory for terminal blocks, ensuring clear and consistent identification of connections. This 10-section strip is vertically labeled with consecutive numbers, facilitating easy tracking and troubleshooting in electrical panels and control systems. Its white color provides high visibility, and the compact 6mm width makes it suitable for a wide range of terminal block applications. Ideal for industrial automation, power distribution, and control panel building, these marker strips contribute to improved safety, efficiency, and maintainability.