Rated voltage:300Vshrinking temperature:80Cshrinking rate:48 percent (Cross sectional percent (longitudinal)heating tool: hot air flame retardant, environmental protection, insulation, soft, stable performance, low temperature shrinkage, shrinking fast, etc. Can have the effect of anti-counterfeiting and Beautify the packing materials, and the items were capsuled can have insulation, moisture proof, anticorrosive, the effect of Dustproof, etc. Appliance: used for single 18650 battery covering. Notice: the battery is not heated when the tube is full shrinkable. And must not continue heat the tube, after it is full shrinkable. This specification PVC heat shrink tubing suit for packaging the single 26650Battery.All 27Mmdiameterbatteries are suitable for. Our shop also has other PVC heating shrink tube for single/multiple batteries, details please contact customer service. The battery is not included.