The revolutionary Micro Purl is cutting-edge transmission line technology. It contains two 50 microns thick by 2mm wide signal carriers made of solid Fine Silver, placed on each side of a copper ground plane. The ultra thin three layer sandwich is then twisted (purled) as it is embedded in a heavy sheath of transparent high grade polymer. The twisting facilitates handling and further enhances EM and RF rejection. Micro Purl is breaking new ground as professional quality microphone and patch cables, and as digital interconnects. Excellent for either balanced (XLR) or single-ended (RCA). Diameter: 0.255" (6.5mm). This bulk cable is sold and priced per foot.