PermaSleeve Heat Shrink Wire and Cable Continuous Labels for 3in Core Printers - 1/2in Dia Black 3:1 heat shrinkable sleeve fit snugly around wires for maximum insulation protection and permanent identification.. Use Part Number IP-R6606 for the BradyPrinter i5100 or BRADY IP Series Label Printer; use R6606 for a different printer. Fade-resistant and smudge-proof for superior aesthetic appearance.