... .Used For Audio Cable 2.Brass/Zinc,Gold/Nickle plate 3.Connector manufacturers 4.Good quailty RCA ConnectorProduct Feature Impedance50Ω,75ΩFrequency range0 ... deal with Connector(BNC,DC,RCA,F) BNC,DC Cable,Coaxial Cable,Other CCTV Products,Such As Video Balun,Audio Monitoring,Brackets,Power Supplys,Etc ...