The PHOENIX CONTACT part ZB 17:UNBEDRUCKT is a white, unlabeled Zack marker strip designed to snap into tall marker grooves on terminal blocks with a width of 17 mm. This strip offers a lettering field size of 17 x 10.5 mm and comes with 5 individual labels that can be labeled using PLOTMARK or CMS-P1-PLOTTER for clear and organized labeling of terminal blocks.