Ultimate Silver Series cables consist of a stranded inner wire that is 50% 99.999 pure silver and 50% 99.999% oxygen free copper coated in Teflon to ensure protection. This mixture is the perfect mix for the ULTIMATE sound where you get the best of both worlds; the high frequencies of silver and the low frequencies of copper. All our cables are cryogenically processed. Cryogenics is the ultra low temperature processing of materials to enhance their desired structural properties. It really makes a difference in sound. We guarantee that you will be completely satisfied once you plug our cables into your audio components (allow a minimum of 50 hours burn in time) or we will refund your money. Our commitment is a product of the highest quality and customer satisfaction.If within 30 days you are not completely satisfied we will refund your money (minus shipping & handling charges). All cables are tested and are in perfect condition before being shipped.