Description Features & Specifications Amtrans 0.9mm Series Insulated Gold-Plated Silver-Plated Solid Core OFC Wire, PFA SleevingFeatures:Gold-plated OFC offers superior sound (no nickel)High electrical rating (600V) & excellent resistance to heat (250°C)Low dielectric constant (≤2.1/60Hz) of PFA (Teflon)Twisted Pair 0.4mm solid core (red and clear)