1.Material:AL2O3 85%-99.5% 2.inside diameter= 0.3-2mm ,Outside diameter=1.0-8mm ,lenght=100-2200mm

1.Material:AL2O3  85%-99.5%2.inside diameter = 0.3-2mm ,Outside diameter=1.0-8mm ,lenght=100-2200mm

3.Feature :Great mechanical strength ,good resistance to thermal impact ,good insulation and highfrequency characteristics under high temperature ,breakdown volage and volume resistance and selfreactance are great and thermal expansion coefficient is small .

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