Phoenix Contact 0808749 Zack Marker strips are a type of label that features consecutive numbers printed horizontally, ranging from 1-10 to 91-100, and come in various sizes depending on the mounting type, which includes latching ones suitable for terminal blocks with a width of 6.2mm. Each strip consists of multiple individual labels, with 10 being a common configuration, and features text fields measuring 6.15mm in height and 5.15mm in width.