FeaturesHeat shrinkable, with 3:1 shrink ratio, self-extinguishing, made of B-342 polyolefin materialChemical, corrosion, fade, humidity, smear, smudge, UV, weather-resistant, full circle insulating sleevesThermal transfer printing technologyMatte finishBrady® PermaSleeve® heat shrinkable sleeves fit snugly around wires for maximum insulation protection and permanent identification0.187 in dia as supplied0.335 in H