This is buried under the "About" tab on their website.
OCC (Ohno Continuous Cast) is a wire casting process developed to eliminate annealing issues and minimize grain boundaries in silver wire. A silver purity of 7N (99.99999%) results in the lowest distortion of an audio signal. Analogy: Smooth asphalt road compared to a gravel road.
Our wire is custom manufactured for us. It is an alloy of 7N silver 60% and 40% 5N copper. The silver is bonded to the solid copper cores. This method greatly reduces the cost of OCC filament wire yet retains outstanding audio performance. Note: This is not the typical flash-plated stranded wire that many builders offer today.
Air-core Teflon tubing is known for superior dielectric properties when compared to PVC and PE cores making it ideal for use as a conduit in high-end audio cables. Minimal signal dissipation and reflection.
However, under FAQ, this is what they write:
"Is the 7N OCC wire that is used pure silver? Seems like a very good price for silver cables."
Yes. There has been some confusion regarding our wire construction. Our wire is a multicore single conductor with a pure silver bonding. This method offers far better economies than typical OCC filament wire but with similar sonic performance. We have clarified these aspects in the product pages. View the Tech link.
The Tech link takes you to the About page with the actual nitty gritty.