1. quality and quantity guaranteed 2. differentiated index to meet your demand 3. the best shipment with the shortest delivery Application For 550kV, 800kV, 1000kV high-voltage insulation: gas-insulated switchgears (GIS) insulator, cable joint insulator, generator circuit breaker insulator, cable sealing ends etc.Main specification modelAl2O3(≥,%)SiO2(≤,%)Fe2O3(≤,%)Na2O(≤,%)D50 (μm)Real density ...