These RCA audio cables are made with a solid copper core which is superior to stranded core for sound quality as well as its longevity. Solid copper is a great conductor of electricity and a perfect choice for sending signal between devices. The CL2 rating indicates that the jacket of the cable has been treated with a flame retardant in order to comply with fire safety regulations for in-wall installations. This cable is safe for use through or within walls of residential buildings. CABLE SPECIFICATION36 feet, Black, Dual RCA Audio Coaxial RG6 CableSolid Bare Copper 18AWGDual Shield 60% Braided, 100% Foil Shield3GHz, 75 Ohm Swept TestedUL ETL CL2 Rated for In-Wall InstallationConnectors2 Male RCA to 2 Male RCAGold Plated PinOne Piece All-Metal Compression ConnectorConstructed with Brass, Nickel Plated, Anti-Corrosion MaterialsExcellent Shielding ProtectionUSAGEHome TheaterSubwooferAuxiliaryAV ReceiversStereo SystemsRecording Studio EquipmentSatellite ReceiversCar Audio SystemsStudio EquipmentDVD Blu-ray PlayersMusic InstrumentsASSEMBLYCustomized Cut and Made to OrderMade from Foreign and Domestic ComponentsAssembled in USA by PHAT SATELLITE INTL