spool insulator post insulator ceramic insulator 1.Usage: low voltage 2.Standard: BS,AS,DIN,ANSI ... requirements4. Type: pin type, post type, disc suspensio type, spool/ shackle type,strain typea. Disc insulatorsDisc suspension insulators for high ... voltage lineASNI:52-1,52-2,52-3,52-4....IEC:XHP-70, XHP-70C, XHP-80C, XHP-100, ... noted. We will do the best for you! porcelain spool insulators