... shields and tungsten boats for electronics,lightening,electro-vacuum industries.size: at any size accoding to customer ... OriginHenan, China (Mainland)Brand NamezzstcModel NumberMO1,JMO1Applicationin lighting,Vacuum Electronic DevicesShapeplateMaterialTungstenDimensionsGB3876-83Chemical CompositionTungstenbrandzztcsizeaccording to customer's requirementgradeMo1usagevaccum ...