Dymo - DYM1868809 Heat-shrink tubes with flame-retardant sleeves feature a 3:1 shrink ratio to create a tight, secure fit around your wires and cables. Thermal transfer printing technology protects from smearing and fading for long-lasting print visibility. Tubes are perfect for labeling wires, cables and more. Cartridge is designed for use with Dymo XTL 300 and 500 labelmakers (sold separately).