The 553-50011 is a ShrinkTrak heat-shrinkable marker designed for identifying wires, cables, and other components. This white marker is made from cross-linked Polyolefin (PO-X) and features a 3:1 shrink ratio, allowing it to cover a range of wire diameters up to a maximum of 0.187 inches (4.74 mm). It has an operational temperature range of -55°C to +135°C and meets UL 224 VW-1 flammability standards. Designed for thermal transfer printing, these markers are supplied on a ladder-style carrier system for easy kitting and application, making them suitable for indoor production environments.