A bulk or solid type bushing consists of a central conducting rod available in copper or aluminum, which is encased by an insulator. The surrounding insulator can be manufactured from porcelain, epoxy or thermoplastic materials. The general voltage and current ranges here are:

-LV Bushings up to 5 kV Class and 7500 A 

-HV Bushings from 8.7 kV to 35 kV Class and up to 417 A 

-Power Class Bushings from 5 kV to 46 kV Class and up to 3140 A 

-Air to Air bushings from 15 kV to 38 kV Class and up to 3000 A