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 print technology12 to 4 AWG wire sizeMatte finishBrady® PermaSleeve® heat shrinkable sleeves fit snugly around wires for maximum insulation protection and permanent identification3/8 in Dia sleeve as supplied0.645 in H dimension