The Brother HSe221E 0.35in (9mm) Heat Shrink Tube is designed for professional heat shrink labeling of cables, fiber cables, and wires with diameters ranging from 0.062in to 0.21in (1.6mm to 5.4mm). With black print on white tubing, it supports high visibility and durability in demanding environments. Featuring a 3:1 shrink ratio, the electrical shrink tube easily passes over connectors and shrinks down when heat is applied for a secure, professional finish. This heat shrink tape is ideal for electricians, network installers, and contractors who need long-lasting cable identification. The tubing meets UL 224 standards, withstanding up to 600 volts and temperatures up to 257°F (125°C). Each cassette includes 4.9 ft (1.5m) of electrical heat shrink wrap and is compatible with Brother P-touch EDGE 300 series, 500 series and 800, and P-touch Desktop 900 series industrial heat shrink label printers.