The PVC Heat Shrink Tubing Tube 85mm Flat Width and is suitable for 18650 batteries. Specifications:Flat Width: 85mm/3.35-inchRated Voltage:300VShrinkable Temperature:80 Temperature Range: -40 to +105 Shrinking Rate: 48%(cross section)and 5%(longitudinal)Length: 1M/3.28 FtColor: Clear