Description :   1\/2 Inch 12.7mm Polyolefin 3 : 1 Heat Shrink Tubing Tube   Supplied internal diameter : 12.7 mm minimum Fully shrunk internal diameter : 4.20 mm maximum Colour : Black Length : 50CM Shrinkage Ratio : 3 : 1 (will shrink to 1\/3 its supplied diameter) Material : Polyolefin Minimum Shrinkage Temp : +70 C Full Shrinkage Temp : +110 C maximum  Operating Temperature : -55 C to +125 C Tensile strength : 10.4 Mpa Dielectric strength : 15 kV\/mm Manufacture specification : ISO9001 Flammability : Flame Retardant Approvals : UL Approved Supplied format (round or flat) : Product is supplied flat Cutting method : Scissors or sharp knife Total wall thickness : 1.70±0.15 Wall thickness of adhesive : 0.50± 0.12  Package Includes :   1 x Heat Shrink(12.7mm)  Details pictures :