What is the outer diameter of the insulation?

When separated, a single strand is .165 in. in diameter and together it measures .165 in. by .345 in.

It says 99% copper but looks like less conductive and cheaper copper clad aluminum. . Which is it?

I assumed it was as advertised: 99% copper. There are different grades of copper, so conductivity may well vary, but like you, I was looking for a step up from copper clad aluminum. Don't know for sure if I got it, but the cable is thick and my system sounds good with it.

Probably china. The wire feels very high quality. It’s soft and flexible, and I got fuller richer sound out my home theater after I rewired with this.

So are we getting 50ft of each =100ft or 100ft of each =200ft?

It's One 100ft spool of speaker wire.

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🎶 Elevate Your Sound Experience!

FLEXIBLE DURABLE - Easily install in any environment, indoors or outdoors.
PERFECT FOR ANY SETUP - Ideal for home theaters and car stereo systems alike.
OXYGEN FREE EXCELLENCE - Minimize signal loss for crystal-clear sound transmission.
UNMATCHED SOUND CLARITY - Experience audio like never before with superior conductivity.
LONG LASTING PERFORMANCE - Built to withstand wear and tear for years of high-quality sound.

The InstallGear 12 Gauge Speaker Wire is a 30ft long, high-quality audio cable made from oxygen-free copper, designed for superior sound clarity and durability. Its flexible PVC jacket ensures easy installation, making it perfect for both indoor and outdoor audio setups.

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