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Round Polyethylene insulators! Very handy for antenna projects where a dog bone insulator won't work. Works great for random wire antennas or loops. Endless uses in antenna building. They can be attached with wire, rope or even a nail or spike. They measure about 1-11/16" in diameter and about 1-1/8" thick. The hole size is just slightly less than 1/2" in diameter. The diameter of the grove is about 15/16" and works with up to about 1/4" size wire or rope. A Dare product.
One just can't have enough antenna building supplies!
Quality Products for the More Knowledgeable and Experienced User !