High insulation, High thermal shock resistance,No shrinkage, High mechanical strength. Hight quality with competitive price Ceramic lampholderMaterial: Steatite or 95% Al2O3Features: 1.High insulation, High thermal shock resistance,No shrinkage, High mechanical strength. 2.Insulationg strength:20KV/mm; Dielectric constant:7~9. 3.Special design and requirement are available.4.High quality with ...