Low & Medium Voltage Pin Type Insulator 55-4 1,Material: Porcelain 2,Port:Fuzhou 3,Payment Term:T/T,L/C 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 3)Standard:ANSI MAIN DIMENSIONS AND STANDARD PARTICULARS Note:The left side of slant is Comman glaze,the right side of slant is semiconductor glaze.