It consists of x7 20awg stranded (10x30 stranding) tinned copper conductors, insulated with EcoGen mPPE (modified PolyPhenylene Ether thermoplastic) jacket, with conductors cabled/twisted at min 6.0 twists/ft, then wrapped in a non-woven polyster core wrap for support and flexing, all in a slate (gray) mPPE outer jacket.
eBay