Porcelain Strain Insulator Guy Strain Insulator Standard: AS; Class: GY1, GY2, GY3, GY4; Strain insulator A stain insulator is an insulator generally of elongated shape, with two transverse holes or slots. It is mainly used on the guy wire structure to balance the tension strength and also provide the insulating.Standard: IEC, ANSI, BS, AS, DIN, CAN and GB and etc.Color: light gray, brown, white, ...