... Voltage Pin Type Insulator 55-4 1,Material: Porcelain 2,Port:Fuzhou 3,Payment Term:T/T,L/C 4,Standard:ANSI Low ... & Medium Voltage Pin Type Insulator 55-4 High voltage porcelain insulator 1)Series:55-1,55-2,55-3,54-4,55-5,etc.2)Material:Porcelain ...