Specifications:Material: PolyethyleneShrinkage rate: 2:1 ( will maximum shrink to 1/2 of its supplied diameter )Minimum Shrinkage Temp: +70 Degree CelsiusFull Shrinkage Temp: +125 Degree Celsius maximumOperating Temperature: -55 to 125 Degree CelsiusRated voltage: 1000VDielectric strength: 1 KVItem Shape: Round/Flat