Insultab 303000001A5 HS-105 3", 5' Black Polyvinylchloride Heat Shrink Tubing Black heat shrink tubing for bundling wires, repairing insulation, insulating wires and wired connections, and providing strain relief PVC for strength and resistance to chemicals, oils, moisture, salt water, fungus, and UV light Provides a 2:1 shrink ratio 3" expanded inside diameter (size prior to shrinking) RoHS compliant; UL Subject 224 VW-1 for flammability; CSA OFT rated for 600V; ASTM International Standard D3150; SAE-AMS-DTL-23053/2 Class 2