Conductor: Oxygen-Free Copper wire(OFC) Optional Silver-Plated Copper wire(SPC), high conductivity, low resistance and high fidelity Insulation: Low Density Polyethylene(LDPE), low capacitance between conductor and shield Optional Specially designed air-spaced PE insulation for ultra-low capacitance Shield: High coverage spiral shield to eliminate Electric-Magnetic Interference (EMI) Optional conductive PVC to reinforce shield Optional specially designed 2-layer and 2-directional shield to ensure perfect shield and lowest EMI Optional normal PVC jacket and Non-migration PVC jacket against ABS and PS Optional Nylon braid sleeve to avoid dust contamination. A large variety of RCA phone plugs of high purity copper are available