ANSI 57-2 Post insulators of ceramics Good quality & Best price Specification:1) ... also customer’s special requirements.4) Type: pin type,post type,disc suspension type,spool/shackle type,strain typea. ... Voltage Lines Pin Type Insulator (ANSI): 56-1,56-2,56-3,56-4,56-5Pin Type Insulator for ... ,ALP22/450,ALP22/480,ALP22/520,ALP22/920 c. Post insulatorsPost insulators for high voltage lines (ANSI): 57-1s ...