The HellermannTyton 533-65011 Wire Labels and Markers Shrinkable Markers Ladder Style are thermal transfer, 2:1 (12.7 mm/6.4 mm) white 25 mm and come in a lot of 3000 pieces. These markers are designed to be highly resistant to heat, most chemicals, and abrasions. They provide improved visibility to create an organized, efficient, and attractive workplace. These markers can be used to label wires, cables, and other components.