Identify and protect your wire and cables: Looking for a non-adhesive yet permanent solution to identify and protect your wire and cables at the same time? DYMOs heat shrink polyolefin tubes provide clean and permanent marking for a wide range of cable diameters. These sleeves are applied before connection and can be permanently positioned after connection when shrunk with a heat-gun. Features: 3:1 shrink ratio Conforms tightly to the wire when heat is applied Heat-shrinkable polyolefin Does not smudge or fade when printed. The legend remains legible even after exposure to abrasion,cleaning solvents or industrial fluids Flame retardant MIL-DTL-23053/5 classes 1 and 3