The PHOENIX CONTACT part 1053001 is a Zack marker strip designed for easy labeling and identification of terminal blocks. It comes in a sleek white color and is unlabeled, making it customizable for various applications. The marker strip can be easily labeled using the PLOTMARK or CMS-P1-PLOTTER, providing a convenient solution for organizing wiring and connections. It is designed to snap into the tall marker groove and is suitable for terminal blocks with a width of 10.2 mm. The lettering field offers ample space with dimensions of 10.5 x 10.15 mm, allowing for clear and legible labeling. Each strip contains 10 individual labels, making it a versatile and efficient marking solution for your electrical projects.