Alumina ceramic insulator: 1)Made of alumina ceramic material. 2)Fired through high temperature 3)Progress:grind,polish

 Alumina ceramic insulator: 1)Made of alumina ceramic material. 2)Fired through high temperature 3)Progress:grind,polish 4)High intension 5)Solid-resist 6)Alkali-resist 7)Un-knit and velvet surface 8)Good airproof capability 9)Good grind-resist capability

Ceramic insulator