Brady, M21-375-C-342, BMP21 PermaSleeve Wire Marking Sleeve, 7, Polyolefin, 12 to 4 GaugeFeatures:3:1 heat-shrinking wire sleeve is ideal for labeling in harsh environments and is resistant to chemicals, grease, oil and cleaning agentsPolyolefin wire marking sleeves have a smudge-proof finish and print in black text on a white backgroundPermaSleeve labels provide wire identification that combines speed, ease of use and permanence for long-lasting, high quality identificationCold resistant and flame-retardant with an operating temperature of -67° F to 275° F (-55° C to 135° C)PermaSleeve wire labels are ideal for electrical contractors, maintenance crews and industrial professionalsApplications:Cable and Wire MarkingPanel LabelingThe B-342 Polyolefin PermaSleeve material is a non-adhesive, heat-shrinking sleeve that fits around wires or cables for easy permanent identification