Zeus FEP Heat Shrink Tubing,  3/8" ID, Heat Shrink Ratio 1.6:1 48" L Heat shrink tubing for bundling wires, repairing insulation, insulating wires and wired connections, and providing strain relief FEP for resistance to chemicals and abrasions without the high temperature required by PTFE to shrink Provides a 1.6:1 shrink ratio 3/8" inside diameter (size prior to shrinking) UL Recognized and CSA certified for quality assurance; SAE-AMS-DTL-23053/11