ceramic spool post insulator 1.Usage: low voltage 2.Standard: BS,AS,DIN,ANSI and IEC Specification:1. Porcelain or glass insulators for low & ... foreign standard, and customer's special 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 ...