The all new Spiralator is a revolution in tube insulators. Unlike a normal fin tube which you must put on before tensioning the wire, the Spiralator is put on after the wire is tensioned. A quick twist of the wrist and it snaps onto the wire. Comes in 4" and 6" length complete with staples, or 500 piece bulk box without staples. Also available in 50' coils, excellent when diagonal brace wires are too close to hot wires.