1)Conductor:BC TC CCA OFC 2)Insulation:transparent color PE PVC 3)we have do it about 10 years 4)high quality and low price Product Name: Speaker cablesConductor Material of Speaker Cables : TC,BC,CCA ,Copper ,Aluminum ectType of Speaker Cables: Low Voltage (<80V)Material of insulator for Speaker Cables: PVC,Chemical Resistant,Moisture Resistant.Color of insulator for Speaker Cables:Transparent, ...