1.disc suspension insulator 2.Material : Procelain 3.Size: 52-3 We are manufacture for all kinds of overhead line fitting , ... clamp ,stay rod ,Procelain Insulator ,such as : 52-3,56-2,56-3,P-11Y and so on .Hope we can have ... supply best quality and price for you . Disc Insulator 52-3 / procelain insulator/ceramic insulator