... Post insulators of ceramics Good quality & Best price Specification:1) Porcelain or glass insulators for low & medium or high voltage2) Voltage ... ,57-1L,57-2L,57-3L,57-4L,57-5L,27-11,57-12,57-13,57-14,57-15 d ... :54-1,54-2,54-3,54-4,54-5 e. Spool Insulators for ANSI & BS 5) Colour: gray,brown,white ...