Phoenix Contact 0824638 A marker for terminal blocks can be ordered in various ways, including by sheet size. Customers can also request a custom labeling option to suit their specifications. The marker has a flat design that snaps into place and is available in specific dimensions, including a width of 5.2mm and text fields measuring 5.1mm in height and 4.6mm in width, with each label featuring 96 individual lines for writing information.