Phoenix Contact 0824678 You can obtain a marker for terminal blocks in various formats, including sheet style. These markers are available in white and can be customized with customer-specified labels. They come with different mounting options, but most have a flat marker groove that snaps into place. The markers cater to terminals with a 16mm width, and each sheet contains 32 individual labels. Each label features a text field measuring 5.1mm in height and 15.45mm in width.