3:1 heat shrinkable sleeve fit snugly around wires for maximum insulation protection and permanent identification. Fade-resistant and smudge-proof for superior aesthetic appearance. Cold resistant and flame-retardant with an operating temperature of -55°C to 135°C. Meets SAE-AMS-DTL-23053/5C (Class 1), SAE-AS-81531, MIL-STD-202; RoHS Compliant; and UL Recognised PermaSleeve® PS Heat-Shrink Polyolefin (B-342) wire marking sleeves combine speed, ease of use, and permanence to create long-lasting, high quality identification. For use with BMP®61 Labeling System, BMP®71 Label Printer, BradyPrinter M611, TLS 2200® Thermal Labeling System, TLS-PC LINK Thermal Labeling System.