I bought 12 foot 4 gauge 100% copper jumper wire. The actual conductor is definitely 4 gauge. The Parrot clamps are of very high quality and the connection of the wire to the copper jaw is very well done. The insulation is thick and fairly flexible. For the price paid, this is one of the best connection cables you can find. By the way, I'm obsessed to death with things and have reviewed over 50 pairs of patch cords before settling on this one.
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