... distance::298, 215,150mm 3) CIQ Test report RM-1&2 porcelain pin insulator Quick Details Place of Origin: Fujian China ... 1)Pin insulator for telephone line 2)Leakage distance:298, 215,150mm 3)Item no.:RM-1,RM-2,RM-3 3)Dimension: H ... price2.Safe usage3.Customized designs accepted4.Good quality RM-1&2 porcelain pin insulator