Zeus PTFE  Heat Shrink Tubing, 20 Gauge, Minimum Expanded ID 0.06", 0.006" Wall, Shrink Rat 2:1 48" Length Heat shrink tubing for bundling wires, repairing insulation, insulating wires and wired connections, and providing strain relief PTFE for flexibility, resistance to chemicals and abrasions, and high heat tolerance Provides a 2:1 shrink ratio 0.060" inside diameter (size prior to shrinking) UL Recognized and CSA certified for quality assurance; SAE-AMS-DTL-23053/12