Phoenix Contact 0824581 Terminal block markers are available in various configurations that can be tailored to meet customer needs. For instance, customers can opt for a sheet of markers with specific labeling, which can be mounted using a snap-in mechanism into the tall marker groove of terminal blocks. The markers come in different widths, but those with a width of 5.2 mm are particularly relevant. A sheet of 96 individual labels is also available, along with text fields that measure 4.6 mm in height and 10.5 mm in width.