The Phoenix Contact ZB 6,QR:FORTL.ZAHLEN 191-200 marker strip is a crucial accessory for terminal block organization and identification. This 10-section strip is vertically labeled with consecutive numbers, ensuring accurate and easy identification of individual terminal blocks. Its white color provides excellent contrast for readability, and the compact 6mm width makes it suitable for a wide range of terminal block applications in industrial control panels, automation systems, and electrical distribution boards. Proper labeling is essential for efficient maintenance, troubleshooting, and ensuring the reliability of electrical systems.