Electric fence insulators corner - donut"red snap'r" yellow bag of 10 Designed for low impedance and standard duty fence controllers. Unbreakable polycarbonate 5,000 pound tensile strength vs 700 pound for porcelain. Will not chip, crack from stress, shortout or rust. Unique built-in wire channel keeps wire centered. Same s ize and dimension as porcelain corner. Use with any gauge wire or high tensile fences including barbed wire. U.V. protected to resist weathering.