... pin suspension porcelain insulator 52-1/52-2/52-3/52-4/52-5 Features 1)Cap and pin type suspension ... pin suspension porcelain insulator 52-1/52-2/52-3/52-4/52-5Features1)Cap and pin type suspension insulator ... )ANSI standard4)Item no.:52-1, 52-2, 52-3, 52-4, 52-5, 52-6, 52-8, 52-95) ... electric products,our products has passed the ISO9001 quality system authentication in 2008.Products have won the CE,VDE ...