These are handcrafted braided adaptors made of 8 cores of AWG36 (0.127mm) HIGH Purity single crystal silver along with Teflon insulation. This insulation offers predominant air dielectric and is deemed as the best insulator for bare cable. To make joining of the connector to the conductor seamless these adaptors are soldered with Cardas ultra-pure and Quad Eutectic solder. For faster signal transmission and low-level distortion, it has 6N silver. If you are a balanced audio enthusiast this adapter will make it easy for you to use your headphones with 2.5mm outputs saving your time and effort of changing cables. They are durable and designed to be age resistant.