line post insulator with ANSI standard, grey glaze colour,we have ... specialize in producing this Line Post Insulator widely used on distribution line ,net work, transmission line and other power line . The insulator can be ... .5KN, 16KN. Main type: type: 57-1, 57-2, 57-3, 57-4, 57-5, 57-11, 57-12, 57-13, 57 ... -35 According to ANSI C29.7 , IEC383 and BS137. 57-5 line post insulator