Professional Heat Shrink Labeling – Perfect for marking AWG 0-10 wires, fiber cables, and electrical components with diameters ranging from 0.16in to 0.53in (4.2mm to 13.5mm) with durable, easy-to-read black-on-white shrink tubing. Secure 3:1 Shrink Ratio – Shrinks to one-third of its size when heat is applied, allowing it to fit tightly around cables and connectors for long-lasting identification. High-Performance Electrical Shrink Tube – Meets UL 224 standards, rated for up to 600 volts, and withstands temperatures up to 257°F (125°C). Compatible with Heat Shrink Label Printers – Works with Brother P-touch EDGE 500 series, and 800, plus P-touch Desktop 900 series indsustrial heat shrink label printers. Convenient Cassette Format – Includes 4.9 ft (1.5m) of tubing per cassette, one cassette per package—ready to load and print.